21483438664 has 16 divisors (see below), whose sum is σ = 40283712000. Its totient is φ = 10741115472.

The previous prime is 21483438617. The next prime is 21483438671. The reversal of 21483438664 is 46683438412.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99609 + ... + 229975.

It is an arithmetic number, because the mean of its divisors is an integer number (2517732000).

Almost surely, 2^21483438664 is an apocalyptic number.

It is an amenable number.

21483438664 is a deficient number, since it is larger than the sum of its proper divisors (18800273336).

21483438664 is a wasteful number, since it uses less digits than its factorization.

21483438664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150972 (or 150968 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 49.

The spelling of 21483438664 in words is "twenty-one billion, four hundred eighty-three million, four hundred thirty-eight thousand, six hundred sixty-four".