21514488560 has 40 divisors (see below), whose sum is σ = 51634778496. Its totient is φ = 8328188160.

The previous prime is 21514488559. The next prime is 21514488577. The reversal of 21514488560 is 6588441512.

It is a tau number, because it is divible by the number of its divisors (40).

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, 4335119 + ... + 4340078.

Almost surely, 2^21514488560 is an apocalyptic number.

21514488560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21514488560 is an abundant number, since it is smaller than the sum of its proper divisors (30120289936).

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

21514488560 is a wasteful number, since it uses less digits than its factorization.

21514488560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8675241 (or 8675235 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 44.

The spelling of 21514488560 in words is "twenty-one billion, five hundred fourteen million, four hundred eighty-eight thousand, five hundred sixty".