20431010131 has 16 divisors (see below), whose sum is σ = 23987454400. Its totient is φ = 17034261120.

The previous prime is 20431010107. The next prime is 20431010143. The reversal of 20431010131 is 13101013402.

It is a cyclic number.

It is not a de Polignac number, because 20431010131 - 2¹⁵ = 20430977363 is a prime.

It is a super-2 number, since 2×20431010131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20431010531) 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, 1169521 + ... + 1186861.

It is an arithmetic number, because the mean of its divisors is an integer number (1499215900).

Almost surely, 2^20431010131 is an apocalyptic number.

20431010131 is a deficient number, since it is larger than the sum of its proper divisors (3556444269).

20431010131 is a wasteful number, since it uses less digits than its factorization.

20431010131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21934.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20431010131 its reverse (13101013402), we get a palindrome (33532023533).

The spelling of 20431010131 in words is "twenty billion, four hundred thirty-one million, ten thousand, one hundred thirty-one".