21442535600 has 30 divisors (see below), whose sum is σ = 51515692740. Its totient is φ = 8577014080.

The previous prime is 21442535599. The next prime is 21442535627. The reversal of 21442535600 is 653524412.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26802770 + ... + 26803569.

It is an arithmetic number, because the mean of its divisors is an integer number (1717189758).

Almost surely, 2^21442535600 is an apocalyptic number.

21442535600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21442535600 is an abundant number, since it is smaller than the sum of its proper divisors (30073157140).

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

21442535600 is a wasteful number, since it uses less digits than its factorization.

21442535600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53606357 (or 53606346 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The spelling of 21442535600 in words is "twenty-one billion, four hundred forty-two million, five hundred thirty-five thousand, six hundred".