21153772410 has 16 divisors (see below), whose sum is σ = 50769053856. Its totient is φ = 5641005968.

The previous prime is 21153772397. The next prime is 21153772427. The reversal of 21153772410 is 1427735112.

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, 352562844 + ... + 352562903.

It is an arithmetic number, because the mean of its divisors is an integer number (3173065866).

Almost surely, 2^21153772410 is an apocalyptic number.

21153772410 is an abundant number, since it is smaller than the sum of its proper divisors (29615281446).

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

21153772410 is a wasteful number, since it uses less digits than its factorization.

21153772410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705125757.

The product of its (nonzero) digits is 11760, while the sum is 33.

The spelling of 21153772410 in words is "twenty-one billion, one hundred fifty-three million, seven hundred seventy-two thousand, four hundred ten".