21423983624 has 16 divisors (see below), whose sum is σ = 41555141100. Its totient is φ = 10342612672.

The previous prime is 21423983621. The next prime is 21423983639. The reversal of 21423983624 is 42638932412.

It can be written as a sum of positive squares in 2 ways, for example, as 21048786724 + 375196900 = 145082^2 + 19370^2 .

It is not an unprimeable number, because it can be changed into a prime (21423983621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46172147 + ... + 46172610.

Almost surely, 2^21423983624 is an apocalyptic number.

It is an amenable number.

21423983624 is a deficient number, since it is larger than the sum of its proper divisors (20131157476).

21423983624 is a wasteful number, since it uses less digits than its factorization.

21423983624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92344792 (or 92344788 counting only the distinct ones).

The product of its digits is 497664, while the sum is 44.

The spelling of 21423983624 in words is "twenty-one billion, four hundred twenty-three million, nine hundred eighty-three thousand, six hundred twenty-four".