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18054893792 = 25131719134369
BaseRepresentation
bin10000110100001001…
…111101000011100000
31201121021110122011002
4100310021331003200
5243434023100132
612143323011132
71206263031215
oct206411750340
951537418132
1018054893792
117725575a31
1235ba669aa8
131919710310
14c33c39b0c
1570a0ed262
hex43427d0e0

18054893792 has 96 divisors (see below), whose sum is σ = 42665162400. Its totient is φ = 7430012928.

The previous prime is 18054893777. The next prime is 18054893807. The reversal of 18054893792 is 29739845081.

It is an interprime number because it is at equal distance from previous prime (18054893777) and next prime (18054893807).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67184 + ... + 201552.

It is an arithmetic number, because the mean of its divisors is an integer number (444428775).

Almost surely, 218054893792 is an apocalyptic number.

It is a pronic number, being equal to 134368×134369.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18054893792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21332581200).

18054893792 is an abundant number, since it is smaller than the sum of its proper divisors (24610268608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18054893792 is a wasteful number, since it uses less digits than its factorization.

18054893792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134428 (or 134420 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 56.

The spelling of 18054893792 in words is "eighteen billion, fifty-four million, eight hundred ninety-three thousand, seven hundred ninety-two".

Divisors: 1 2 4 8 13 16 17 19 26 32 34 38 52 68 76 104 136 152 208 221 247 272 304 323 416 442 494 544 608 646 884 988 1292 1768 1976 2584 3536 3952 4199 5168 7072 7904 8398 10336 16796 33592 67184 134368 134369 268738 537476 1074952 1746797 2149904 2284273 2553011 3493594 4299808 4568546 5106022 6987188 9137092 10212044 13974376 18274184 20424088 27948752 29695549 33189143 36548368 40848176 43401187 55897504 59391098 66378286 73096736 81696352 86802374 118782196 132756572 173604748 237564392 265513144 347209496 475128784 531026288 564215431 694418992 950257568 1062052576 1128430862 1388837984 2256861724 4513723448 9027446896 18054893792