21153776200 has 48 divisors (see below), whose sum is σ = 51320911680. Its totient is φ = 8093616960.

The previous prime is 21153776173. The next prime is 21153776233. The reversal of 21153776200 is 267735112.

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, 2294724 + ... + 2303923.

It is an arithmetic number, because the mean of its divisors is an integer number (1069185660).

Almost surely, 2^21153776200 is an apocalyptic number.

21153776200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21153776200 is an abundant number, since it is smaller than the sum of its proper divisors (30167135480).

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

21153776200 is a wasteful number, since it uses less digits than its factorization.

21153776200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4598686 (or 4598677 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

The spelling of 21153776200 in words is "twenty-one billion, one hundred fifty-three million, seven hundred seventy-six thousand, two hundred".