21374527663500 has 96 divisors (see below), whose sum is σ = 67901045022720. Its totient is φ = 5181703672000.

The previous prime is 21374527663429. The next prime is 21374527663549. The reversal of 21374527663500 is 536672547312.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 647696460 + ... + 647729459.

It is an arithmetic number, because the mean of its divisors is an integer number (707302552320).

Almost surely, 2^{21374527663500} is an apocalyptic number.

21374527663500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21374527663500 is an abundant number, since it is smaller than the sum of its proper divisors (46526517359220).

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

21374527663500 is a wasteful number, since it uses less digits than its factorization.

21374527663500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295425952 (or 1295425940 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 51.

The spelling of 21374527663500 in words is "twenty-one trillion, three hundred seventy-four billion, five hundred twenty-seven million, six hundred sixty-three thousand, five hundred".