21322605560 has 32 divisors (see below), whose sum is σ = 48321025200. Its totient is φ = 8467680000.

The previous prime is 21322605547. The next prime is 21322605583. The reversal of 21322605560 is 6550622312.

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, 1911941 + ... + 1923060.

Almost surely, 2^21322605560 is an apocalyptic number.

21322605560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21322605560 is an abundant number, since it is smaller than the sum of its proper divisors (26998419640).

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

21322605560 is a wasteful number, since it uses less digits than its factorization.

21322605560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3835151 (or 3835147 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 21322605560 in words is "twenty-one billion, three hundred twenty-two million, six hundred five thousand, five hundred sixty".