231000320020 has 48 divisors (see below), whose sum is σ = 510714993600. Its totient is φ = 87522785280.

The previous prime is 231000320009. The next prime is 231000320063. The reversal of 231000320020 is 20023000132.

It is a happy number.

It is a super-2 number, since 2×231000320020² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2469300 + ... + 2561140.

It is an arithmetic number, because the mean of its divisors is an integer number (10639895700).

Almost surely, 2^231000320020 is an apocalyptic number.

231000320020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231000320020 is an abundant number, since it is smaller than the sum of its proper divisors (279714673580).

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

231000320020 is a wasteful number, since it uses less digits than its factorization.

231000320020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98488 (or 98486 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 231000320020 its reverse (20023000132), we get a palindrome (251023320152).

The spelling of 231000320020 in words is "two hundred thirty-one billion, three hundred twenty thousand, twenty".