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20157044 = 228096229
BaseRepresentation
bin100110011100…
…1001001110100
31101221002021012
41030321021310
520130011134
62000011352
7333221615
oct114711164
941832235
1020157044
1110418316
126900b58
134239a5b
142969c0c
151b826ce
hex1339274

20157044 has 12 divisors (see below), whose sum is σ = 35324100. Its totient is φ = 10064448.

The previous prime is 20157029. The next prime is 20157047. The reversal of 20157044 is 44075102.

It can be written as a sum of positive squares in 2 ways, for example, as 14348944 + 5808100 = 3788^2 + 2410^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20157047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122 + ... + 6350.

It is an arithmetic number, because the mean of its divisors is an integer number (2943675).

Almost surely, 220157044 is an apocalyptic number.

It is an amenable number.

20157044 is a deficient number, since it is larger than the sum of its proper divisors (15167056).

20157044 is a wasteful number, since it uses less digits than its factorization.

20157044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7042 (or 7040 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 20157044 is about 4489.6596752983. The cubic root of 20157044 is about 272.1503818078.

The spelling of 20157044 in words is "twenty million, one hundred fifty-seven thousand, forty-four".

Divisors: 1 2 4 809 1618 3236 6229 12458 24916 5039261 10078522 20157044