23502420531 has 12 divisors (see below), whose sum is σ = 34040446752. Its totient is φ = 15625585296.

The previous prime is 23502420509. The next prime is 23502420553. The reversal of 23502420531 is 13502420532.

It is a happy number.

23502420531 is a `hidden beast` number, since 235 + 0 + 2 + 420 + 5 + 3 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (23502420509) and next prime (23502420553).

It is not a de Polignac number, because 23502420531 - 2¹¹ = 23502418483 is a prime.

It is a super-2 number, since 2×23502420531² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23502420495 and 23502420504.

It is not an unprimeable number, because it can be changed into a prime (23502420031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3554436 + ... + 3561041.

It is an arithmetic number, because the mean of its divisors is an integer number (2836703896).

Almost surely, 2^23502420531 is an apocalyptic number.

23502420531 is a deficient number, since it is larger than the sum of its proper divisors (10538026221).

23502420531 is a wasteful number, since it uses less digits than its factorization.

23502420531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7115850 (or 7115847 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Subtracting from 23502420531 its reverse (13502420532), we obtain a palindrome (9999999999).

The spelling of 23502420531 in words is "twenty-three billion, five hundred two million, four hundred twenty thousand, five hundred thirty-one".