231333220020 has 48 divisors (see below), whose sum is σ = 740266305408. Its totient is φ = 52876164480.

The previous prime is 231333219961. The next prime is 231333220043. The reversal of 231333220020 is 20022333132.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 275396271 + ... + 275397110.

It is an arithmetic number, because the mean of its divisors is an integer number (15422214696).

Almost surely, 2^231333220020 is an apocalyptic number.

231333220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231333220020 is an abundant number, since it is smaller than the sum of its proper divisors (508933085388).

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

231333220020 is a wasteful number, since it uses less digits than its factorization.

231333220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550793400 (or 550793398 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 231333220020 its reverse (20022333132), we get a palindrome (251355553152).

The spelling of 231333220020 in words is "two hundred thirty-one billion, three hundred thirty-three million, two hundred twenty thousand, twenty".