131310400020 has 24 divisors (see below), whose sum is σ = 367669120224. Its totient is φ = 35016106656.

The previous prime is 131310399971. The next prime is 131310400057. The reversal of 131310400020 is 20004013131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1094253274 + ... + 1094253393.

It is an arithmetic number, because the mean of its divisors is an integer number (15319546676).

Almost surely, 2^131310400020 is an apocalyptic number.

131310400020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131310400020 is an abundant number, since it is smaller than the sum of its proper divisors (236358720204).

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

131310400020 is a wasteful number, since it uses less digits than its factorization.

131310400020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188506679 (or 2188506677 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 131310400020 its reverse (20004013131), we get a palindrome (151314413151).

The spelling of 131310400020 in words is "one hundred thirty-one billion, three hundred ten million, four hundred thousand, twenty".