23131032220 has 24 divisors (see below), whose sum is σ = 48702011904. Its totient is φ = 9228252096.

The previous prime is 23131032191. The next prime is 23131032227. The reversal of 23131032220 is 2223013132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131032227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1502199 + ... + 1517518.

It is an arithmetic number, because the mean of its divisors is an integer number (2029250496).

Almost surely, 2^23131032220 is an apocalyptic number.

23131032220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23131032220 is an abundant number, since it is smaller than the sum of its proper divisors (25570979684).

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

23131032220 is a wasteful number, since it uses less digits than its factorization.

23131032220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020109 (or 3020107 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 23131032220 its reverse (2223013132), we get a palindrome (25354045352).

The spelling of 23131032220 in words is "twenty-three billion, one hundred thirty-one million, thirty-two thousand, two hundred twenty".