23389716520 has 32 divisors (see below), whose sum is σ = 52648331400. Its totient is φ = 9352069888.

The previous prime is 23389716491. The next prime is 23389716533. The reversal of 23389716520 is 2561798332.

It can be written as a sum of positive squares in 4 ways, for example, as 10503380196 + 12886336324 = 102486^2 + 113518^2 .

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, 18955 + ... + 217114.

Almost surely, 2^23389716520 is an apocalyptic number.

23389716520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23389716520 is an abundant number, since it is smaller than the sum of its proper divisors (29258614880).

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

23389716520 is a wasteful number, since it uses less digits than its factorization.

23389716520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238557 (or 238553 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 23389716520 in words is "twenty-three billion, three hundred eighty-nine million, seven hundred sixteen thousand, five hundred twenty".