23131340120 has 128 divisors (see below), whose sum is σ = 62144409600. Its totient is φ = 7576436736.

The previous prime is 23131340077. The next prime is 23131340123. The reversal of 23131340120 is 2104313132.

It is a super-2 number, since 2×23131340120² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 23131340092 and 23131340101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131340123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6689432 + ... + 6692888.

It is an arithmetic number, because the mean of its divisors is an integer number (485503200).

Almost surely, 2^23131340120 is an apocalyptic number.

23131340120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23131340120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31072204800).

23131340120 is an abundant number, since it is smaller than the sum of its proper divisors (39013069480).

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

23131340120 is a wasteful number, since it uses less digits than its factorization.

23131340120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4537 (or 4533 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 23131340120 its reverse (2104313132), we get a palindrome (25235653252).

The spelling of 23131340120 in words is "twenty-three billion, one hundred thirty-one million, three hundred forty thousand, one hundred twenty".