20525387031 has 12 divisors (see below), whose sum is σ = 29667711840. Its totient is φ = 13674392640.

The previous prime is 20525386979. The next prime is 20525387039. The reversal of 20525387031 is 13078352502.

It is a happy number.

20525387031 is a `hidden beast` number, since 2 + 0 + 52 + 538 + 70 + 3 + 1 = 666.

It is not a de Polignac number, because 20525387031 - 2¹⁵ = 20525354263 is a prime.

It is a super-2 number, since 2×20525387031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20525387039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 752415 + ... + 779216.

It is an arithmetic number, because the mean of its divisors is an integer number (2472309320).

Almost surely, 2^20525387031 is an apocalyptic number.

20525387031 is a deficient number, since it is larger than the sum of its proper divisors (9142324809).

20525387031 is a wasteful number, since it uses less digits than its factorization.

20525387031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533126 (or 1533123 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 20525387031 in words is "twenty billion, five hundred twenty-five million, three hundred eighty-seven thousand, thirty-one".