21500157363200 has 132 divisors (see below), whose sum is σ = 53343452800512. Its totient is φ = 8592140083200.

The previous prime is 21500157363173. The next prime is 21500157363239. The reversal of 21500157363200 is 236375100512.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27440885 + ... + 28213515.

Almost surely, 2^{21500157363200} is an apocalyptic number.

21500157363200 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 21500157363200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26671726400256).

21500157363200 is an abundant number, since it is smaller than the sum of its proper divisors (31843295437312).

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

21500157363200 is a wasteful number, since it uses less digits than its factorization.

21500157363200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773748 (or 773725 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The spelling of 21500157363200 in words is "twenty-one trillion, five hundred billion, one hundred fifty-seven million, three hundred sixty-three thousand, two hundred".