21632612 has 24 divisors (see below), whose sum is σ = 39014976. Its totient is φ = 10489248.

The previous prime is 21632609. The next prime is 21632623. The reversal of 21632612 is 21623612.

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, 29393 + ... + 30119.

It is an arithmetic number, because the mean of its divisors is an integer number (1625624).

Almost surely, 2^21632612 is an apocalyptic number.

It is an amenable number.

21632612 is a deficient number, since it is larger than the sum of its proper divisors (17382364).

21632612 is a wasteful number, since it uses less digits than its factorization.

21632612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947 (or 945 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 21632612 is about 4651.0871847343. The cubic root of 21632612 is about 278.6354183296.

The spelling of 21632612 in words is "twenty-one million, six hundred thirty-two thousand, six hundred twelve".