20002540131 has 24 divisors (see below), whose sum is σ = 33192966144. Its totient is φ = 11370173040.

The previous prime is 20002540091. The next prime is 20002540171. The reversal of 20002540131 is 13104520002.

It is an interprime number because it is at equal distance from previous prime (20002540091) and next prime (20002540171).

It is not a de Polignac number, because 20002540131 - 2⁹ = 20002539619 is a prime.

It is a super-2 number, since 2×20002540131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20002540171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 819121 + ... + 843186.

It is an arithmetic number, because the mean of its divisors is an integer number (1383040256).

Almost surely, 2^20002540131 is an apocalyptic number.

20002540131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20002540131 is a deficient number, since it is larger than the sum of its proper divisors (13190426013).

20002540131 is a wasteful number, since it uses less digits than its factorization.

20002540131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662511 (or 1662508 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The spelling of 20002540131 in words is "twenty billion, two million, five hundred forty thousand, one hundred thirty-one".