20157257153 has 16 divisors (see below), whose sum is σ = 23384972160. Its totient is φ = 17171500800.

The previous prime is 20157257143. The next prime is 20157257177. The reversal of 20157257153 is 35175275102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20157257153 - 2⁴ = 20157257137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20157257123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192533 + ... + 278178.

It is an arithmetic number, because the mean of its divisors is an integer number (1461560760).

Almost surely, 2^20157257153 is an apocalyptic number.

It is an amenable number.

20157257153 is a deficient number, since it is larger than the sum of its proper divisors (3227715007).

20157257153 is a wasteful number, since it uses less digits than its factorization.

20157257153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470968.

The product of its (nonzero) digits is 73500, while the sum is 38.

The spelling of 20157257153 in words is "twenty billion, one hundred fifty-seven million, two hundred fifty-seven thousand, one hundred fifty-three".