21612022576 has 20 divisors (see below), whose sum is σ = 41943924792. Its totient is φ = 10787783936.

The previous prime is 21612022571. The next prime is 21612022609. The reversal of 21612022576 is 67522021612.

It is not an unprimeable number, because it can be changed into a prime (21612022571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1129426 + ... + 1148401.

Almost surely, 2^21612022576 is an apocalyptic number.

It is an amenable number.

21612022576 is a deficient number, since it is larger than the sum of its proper divisors (20331902216).

21612022576 is a wasteful number, since it uses less digits than its factorization.

21612022576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278428 (or 2278422 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 21612022576 in words is "twenty-one billion, six hundred twelve million, twenty-two thousand, five hundred seventy-six".