231040000020 has 24 divisors (see below), whose sum is σ = 646912000224. Its totient is φ = 61610666656.

The previous prime is 231039999989. The next prime is 231040000043. The reversal of 231040000020 is 20000040132.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 231039999960 and 231040000005.

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, 1925333274 + ... + 1925333393.

It is an arithmetic number, because the mean of its divisors is an integer number (26954666676).

Almost surely, 2^231040000020 is an apocalyptic number.

231040000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231040000020 is an abundant number, since it is smaller than the sum of its proper divisors (415872000204).

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

231040000020 is a wasteful number, since it uses less digits than its factorization.

231040000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3850666679 (or 3850666677 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 231040000020 its reverse (20000040132), we get a palindrome (251040040152).

The spelling of 231040000020 in words is "two hundred thirty-one billion, forty million, twenty", and thus it is an aban number.