20152102131 has 64 divisors (see below), whose sum is σ = 34759895040. Its totient is φ = 11301534720.

The previous prime is 20152102109. The next prime is 20152102147. The reversal of 20152102131 is 13120125102.

It is not a de Polignac number, because 20152102131 - 2⁵ = 20152102099 is a prime.

It is a super-2 number, since 2×20152102131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20152102631) 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 63 ways as a sum of consecutive naturals, for example, 2195191 + ... + 2204351.

It is an arithmetic number, because the mean of its divisors is an integer number (543123360).

Almost surely, 2^20152102131 is an apocalyptic number.

20152102131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20152102131 is a deficient number, since it is larger than the sum of its proper divisors (14607792909).

20152102131 is a wasteful number, since it uses less digits than its factorization.

20152102131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9393 (or 9387 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 20152102131 its reverse (13120125102), we get a palindrome (33272227233).

The spelling of 20152102131 in words is "twenty billion, one hundred fifty-two million, one hundred two thousand, one hundred thirty-one".