21534322168 has 16 divisors (see below), whose sum is σ = 40483395000. Its totient is φ = 10738750176.

The previous prime is 21534322153. The next prime is 21534322177. The reversal of 21534322168 is 86122343512.

It is a congruent number.

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, 3548143 + ... + 3554206.

Almost surely, 2^21534322168 is an apocalyptic number.

It is an amenable number.

21534322168 is a deficient number, since it is larger than the sum of its proper divisors (18949072832).

21534322168 is a wasteful number, since it uses less digits than its factorization.

21534322168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7102734 (or 7102730 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The spelling of 21534322168 in words is "twenty-one billion, five hundred thirty-four million, three hundred twenty-two thousand, one hundred sixty-eight".