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20155044 = 22371318457
BaseRepresentation
bin100110011100…
…0101010100100
31101220222112010
41030320222210
520124430134
61555554220
7333213030
oct114705244
941828463
1020155044
1110416868
1268bb970
134238b80
1429691c0
151b81ce9
hex1338aa4

20155044 has 48 divisors (see below), whose sum is σ = 57884288. Its totient is φ = 5315328.

The previous prime is 20155039. The next prime is 20155073. The reversal of 20155044 is 44055102.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20155044.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8137 + ... + 10320.

Almost surely, 220155044 is an apocalyptic number.

It is an amenable number.

20155044 is an abundant number, since it is smaller than the sum of its proper divisors (37729244).

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

20155044 is a wasteful number, since it uses less digits than its factorization.

20155044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18484 (or 18482 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 20155044 is about 4489.4369357415. The cubic root of 20155044 is about 272.1413805084.

The spelling of 20155044 in words is "twenty million, one hundred fifty-five thousand, forty-four".

Divisors: 1 2 3 4 6 7 12 13 14 21 26 28 39 42 52 78 84 91 156 182 273 364 546 1092 18457 36914 55371 73828 110742 129199 221484 239941 258398 387597 479882 516796 719823 775194 959764 1439646 1550388 1679587 2879292 3359174 5038761 6718348 10077522 20155044