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12442154520 = 2335234508027
BaseRepresentation
bin10111001011001110…
…00011011000011000
31012010010002221022210
423211213003120120
5200440142421040
65414342315120
7620220365655
oct134547033030
935103087283
1012442154520
1153052a9934
1224b2a28aa0
131233945513
14860636c2c
154cc4ae480
hex2e59c3618

12442154520 has 64 divisors (see below), whose sum is σ = 38949361920. Its totient is φ = 3173650304.

The previous prime is 12442154489. The next prime is 12442154537. The reversal of 12442154520 is 2545124421.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 2251254 + ... + 2256773.

It is an arithmetic number, because the mean of its divisors is an integer number (608583780).

Almost surely, 212442154520 is an apocalyptic number.

12442154520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12442154520 is an abundant number, since it is smaller than the sum of its proper divisors (26507207400).

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

12442154520 is a wasteful number, since it uses less digits than its factorization.

12442154520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508064 (or 4508060 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 12442154520 its reverse (2545124421), we get a palindrome (14987278941).

The spelling of 12442154520 in words is "twelve billion, four hundred forty-two million, one hundred fifty-four thousand, five hundred twenty".

Divisors: 1 2 3 4 5 6 8 10 12 15 20 23 24 30 40 46 60 69 92 115 120 138 184 230 276 345 460 552 690 920 1380 2760 4508027 9016054 13524081 18032108 22540135 27048162 36064216 45080270 54096324 67620405 90160540 103684621 108192648 135240810 180321080 207369242 270481620 311053863 414738484 518423105 540963240 622107726 829476968 1036846210 1244215452 1555269315 2073692420 2488430904 3110538630 4147384840 6221077260 12442154520