23131200220 has 48 divisors (see below), whose sum is σ = 49743717408. Its totient is φ = 9031742720.

The previous prime is 23131200217. The next prime is 23131200241. The reversal of 23131200220 is 2200213132.

It is a junction number, because it is equal to n+sod(n) for n = 23131200194 and 23131200203.

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, 153435 + ... + 264205.

It is an arithmetic number, because the mean of its divisors is an integer number (1036327446).

Almost surely, 2^23131200220 is an apocalyptic number.

23131200220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23131200220 is an abundant number, since it is smaller than the sum of its proper divisors (26612517188).

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

23131200220 is a wasteful number, since it uses less digits than its factorization.

23131200220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111030 (or 111028 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 23131200220 its reverse (2200213132), we get a palindrome (25331413352).

The spelling of 23131200220 in words is "twenty-three billion, one hundred thirty-one million, two hundred thousand, two hundred twenty".