21424313732 has 24 divisors (see below), whose sum is σ = 37708440000. Its totient is φ = 10650553056.

The previous prime is 21424313719. The next prime is 21424313777. The reversal of 21424313732 is 23731342412.

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 7 ways as a sum of consecutive naturals, for example, 1171394 + ... + 1189542.

It is an arithmetic number, because the mean of its divisors is an integer number (1571185000).

Almost surely, 2^21424313732 is an apocalyptic number.

It is an amenable number.

21424313732 is a deficient number, since it is larger than the sum of its proper divisors (16284126268).

21424313732 is a wasteful number, since it uses less digits than its factorization.

21424313732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19835 (or 19833 counting only the distinct ones).

The product of its digits is 24192, while the sum is 32.

The spelling of 21424313732 in words is "twenty-one billion, four hundred twenty-four million, three hundred thirteen thousand, seven hundred thirty-two".