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20488160 = 2557111663
BaseRepresentation
bin100111000100…
…1111111100000
31102112220110202
41032021333200
520221110120
62011044332
7336101150
oct116117740
942486422
1020488160
1110624070
126a406a8
134324694
142a14760
151bea875
hex1389fe0

20488160 has 96 divisors (see below), whose sum is σ = 60383232. Its totient is φ = 6382080.

The previous prime is 20488159. The next prime is 20488177. The reversal of 20488160 is 6188402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11489 + ... + 13151.

It is an arithmetic number, because the mean of its divisors is an integer number (628992).

Almost surely, 220488160 is an apocalyptic number.

20488160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20488160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30191616).

20488160 is an abundant number, since it is smaller than the sum of its proper divisors (39895072).

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

20488160 is a wasteful number, since it uses less digits than its factorization.

20488160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696 (or 1688 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 20488160 is about 4526.3848709539. The cubic root of 20488160 is about 273.6324836322.

It can be divided in two parts, 20488 and 160, that multiplied together give a triangular number (3278080 = T2560).

The spelling of 20488160 in words is "twenty million, four hundred eighty-eight thousand, one hundred sixty".

Divisors: 1 2 4 5 7 8 10 11 14 16 20 22 28 32 35 40 44 55 56 70 77 80 88 110 112 140 154 160 176 220 224 280 308 352 385 440 560 616 770 880 1120 1232 1540 1663 1760 2464 3080 3326 6160 6652 8315 11641 12320 13304 16630 18293 23282 26608 33260 36586 46564 53216 58205 66520 73172 91465 93128 116410 128051 133040 146344 182930 186256 232820 256102 266080 292688 365860 372512 465640 512204 585376 640255 731720 931280 1024408 1280510 1463440 1862560 2048816 2561020 2926880 4097632 5122040 10244080 20488160