23331221320 has 32 divisors (see below), whose sum is σ = 57267544320. Its totient is φ = 8484080320.

The previous prime is 23331221299. The next prime is 23331221357. The reversal of 23331221320 is 2312213332.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 23331221291 and 23331221300.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26512312 + ... + 26513191.

It is an arithmetic number, because the mean of its divisors is an integer number (1789610760).

Almost surely, 2^23331221320 is an apocalyptic number.

23331221320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23331221320 is an abundant number, since it is smaller than the sum of its proper divisors (33936323000).

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

23331221320 is a wasteful number, since it uses less digits than its factorization.

23331221320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53025525 (or 53025521 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 23331221320 its reverse (2312213332), we get a palindrome (25643434652).

The spelling of 23331221320 in words is "twenty-three billion, three hundred thirty-one million, two hundred twenty-one thousand, three hundred twenty".