21153696960 has 112 divisors (see below), whose sum is σ = 73268750592. Its totient is φ = 5128166400.

The previous prime is 21153696959. The next prime is 21153696979. The reversal of 21153696960 is 6969635112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 991036 + ... + 1012155.

Almost surely, 2^21153696960 is an apocalyptic number.

21153696960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21153696960 is an abundant number, since it is smaller than the sum of its proper divisors (52115053632).

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

21153696960 is a wasteful number, since it uses less digits than its factorization.

21153696960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003222 (or 2003212 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 48.

The spelling of 21153696960 in words is "twenty-one billion, one hundred fifty-three million, six hundred ninety-six thousand, nine hundred sixty".