23131303020 has 72 divisors (see below), whose sum is σ = 80188521504. Its totient is φ = 5287154688.

The previous prime is 23131303007. The next prime is 23131303049. The reversal of 23131303020 is 2030313132.

23131303020 is a `hidden beast` number, since 231 + 3 + 130 + 302 + 0 = 666.

It is a super-2 number, since 2×23131303020² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 23131302984 and 23131303002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9177829 + ... + 9180348.

Almost surely, 2^23131303020 is an apocalyptic number.

23131303020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23131303020 is an abundant number, since it is smaller than the sum of its proper divisors (57057218484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23131303020 is a wasteful number, since it uses less digits than its factorization.

23131303020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18358199 (or 18358194 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 23131303020 its reverse (2030313132), we get a palindrome (25161616152).

The spelling of 23131303020 in words is "twenty-three billion, one hundred thirty-one million, three hundred three thousand, twenty".