21413666632 has 64 divisors (see below), whose sum is σ = 43233523200. Its totient is φ = 9918120960.

The previous prime is 21413666623. The next prime is 21413666641. The reversal of 21413666632 is 23666631412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21413666623) and next prime (21413666641).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1023169 + ... + 1043887.

It is an arithmetic number, because the mean of its divisors is an integer number (675523800).

Almost surely, 2^21413666632 is an apocalyptic number.

It is an amenable number.

21413666632 is an abundant number, since it is smaller than the sum of its proper divisors (21819856568).

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

21413666632 is a wasteful number, since it uses less digits than its factorization.

21413666632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20926 (or 20922 counting only the distinct ones).

The product of its digits is 186624, while the sum is 40.

The spelling of 21413666632 in words is "twenty-one billion, four hundred thirteen million, six hundred sixty-six thousand, six hundred thirty-two".