20137156 has 12 divisors (see below), whose sum is σ = 37950892. Its totient is φ = 9294048.

The previous prime is 20137153. The next prime is 20137177. The reversal of 20137156 is 65173102.

It can be written as a sum of positive squares in 2 ways, for example, as 11669056 + 8468100 = 3416^2 + 2910^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20137156.

It is not an unprimeable number, because it can be changed into a prime (20137153) 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, 193575 + ... + 193678.

Almost surely, 2^20137156 is an apocalyptic number.

20137156 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20137156 is a deficient number, since it is larger than the sum of its proper divisors (17813736).

20137156 is a wasteful number, since it uses less digits than its factorization.

20137156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387270 (or 387268 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 20137156 is about 4487.4442614923. Note that the first 3 decimals coincide. The cubic root of 20137156 is about 272.0608463934.

It can be divided in two parts, 2013 and 7156, that multiplied together give a triangular number (14405028 = T₅₃₆₇).

The spelling of 20137156 in words is "twenty million, one hundred thirty-seven thousand, one hundred fifty-six".