23220432520 has 16 divisors (see below), whose sum is σ = 52245973260. Its totient is φ = 9288172992.

The previous prime is 23220432517. The next prime is 23220432523. The reversal of 23220432520 is 2523402232.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23220432517) and next prime (23220432523).

It can be written as a sum of positive squares in 2 ways, for example, as 23184934756 + 35497764 = 152266^2 + 5958^2 .

It is not an unprimeable number, because it can be changed into a prime (23220432523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290255367 + ... + 290255446.

Almost surely, 2^23220432520 is an apocalyptic number.

23220432520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23220432520 is an abundant number, since it is smaller than the sum of its proper divisors (29025540740).

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

23220432520 is a wasteful number, since it uses less digits than its factorization.

23220432520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580510824 (or 580510820 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

Adding to 23220432520 its reverse (2523402232), we get a palindrome (25743834752).

The spelling of 23220432520 in words is "twenty-three billion, two hundred twenty million, four hundred thirty-two thousand, five hundred twenty".