23217972840000 has 700 divisors, whose sum is σ = 89743750107264. Its totient is φ = 5922246528000.

The previous prime is 23217972839947. The next prime is 23217972840113. The reversal of 23217972840000 is 4827971232.

23217972840000 is a `hidden beast` number, since 2 + 3 + 2 + 179 + 72 + 8 + 400 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 99 ways as a sum of consecutive naturals, for example, 74364217 + ... + 74675783.

Almost surely, 2^{23217972840000} is an apocalyptic number.

23217972840000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23217972840000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44871875053632).

23217972840000 is an abundant number, since it is smaller than the sum of its proper divisors (66525777267264).

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

23217972840000 is an equidigital number, since it uses as much as digits as its factorization.

23217972840000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311634 (or 311600 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 23217972840000 in words is "twenty-three trillion, two hundred seventeen billion, nine hundred seventy-two million, eight hundred forty thousand".