20625145131 has 16 divisors (see below), whose sum is σ = 27666797184. Its totient is φ = 13667026944.

The previous prime is 20625145117. The next prime is 20625145159. The reversal of 20625145131 is 13154152602.

It is not a de Polignac number, because 20625145131 - 2⁷ = 20625145003 is a prime.

It is a super-2 number, since 2×20625145131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20625145111) 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, 331416 + ... + 388698.

It is an arithmetic number, because the mean of its divisors is an integer number (1729174824).

Almost surely, 2^20625145131 is an apocalyptic number.

20625145131 is a deficient number, since it is larger than the sum of its proper divisors (7041652053).

20625145131 is a wasteful number, since it uses less digits than its factorization.

20625145131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58010.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 20625145131 its reverse (13154152602), we get a palindrome (33779297733).

The spelling of 20625145131 in words is "twenty billion, six hundred twenty-five million, one hundred forty-five thousand, one hundred thirty-one".