23720170685440 has 44 divisors (see below), whose sum is σ = 56900612582316. Its totient is φ = 9488068272128.

The previous prime is 23720170685411. The next prime is 23720170685447. The reversal of 23720170685440 is 4458607102732.

It can be written as a sum of positive squares in 2 ways, for example, as 3401280193536 + 20318890491904 = 1844256^2 + 4507648^2 .

It is not an unprimeable number, because it can be changed into a prime (23720170685447) 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, 2316417799 + ... + 2316428038.

Almost surely, 2^{23720170685440} is an apocalyptic number.

23720170685440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23720170685440 is an abundant number, since it is smaller than the sum of its proper divisors (33180441896876).

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

23720170685440 is an equidigital number, since it uses as much as digits as its factorization.

23720170685440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4632845862 (or 4632845844 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 49.

The spelling of 23720170685440 in words is "twenty-three trillion, seven hundred twenty billion, one hundred seventy million, six hundred eighty-five thousand, four hundred forty".