21536908960 has 48 divisors (see below), whose sum is σ = 58149657216. Its totient is φ = 7384082688.

The previous prime is 21536908951. The next prime is 21536908963. The reversal of 21536908960 is 6980963512.

It is not an unprimeable number, because it can be changed into a prime (21536908963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9613572 + ... + 9615811.

It is an arithmetic number, because the mean of its divisors is an integer number (1211451192).

Almost surely, 2^21536908960 is an apocalyptic number.

21536908960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21536908960 is an abundant number, since it is smaller than the sum of its proper divisors (36612748256).

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

21536908960 is a wasteful number, since it uses less digits than its factorization.

21536908960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19229405 (or 19229397 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 21536908960 in words is "twenty-one billion, five hundred thirty-six million, nine hundred eight thousand, nine hundred sixty".