23181473172440 has 32 divisors (see below), whose sum is σ = 56899979606160. Its totient is φ = 8429626608000.

The previous prime is 23181473172383. The next prime is 23181473172457. The reversal of 23181473172440 is 4427137418132.

It is a happy number.

It is a congruent number.

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, 26342582711 + ... + 26342583590.

Almost surely, 2^{23181473172440} is an apocalyptic number.

23181473172440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23181473172440 is an abundant number, since it is smaller than the sum of its proper divisors (33718506433720).

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

23181473172440 is a wasteful number, since it uses less digits than its factorization.

23181473172440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52685166323 (or 52685166319 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 47.

The spelling of 23181473172440 in words is "twenty-three trillion, one hundred eighty-one billion, four hundred seventy-three million, one hundred seventy-two thousand, four hundred forty".