21033368164 has 48 divisors (see below), whose sum is σ = 38655025920. Its totient is φ = 9995166720.

The previous prime is 21033368143. The next prime is 21033368173. The reversal of 21033368164 is 46186333012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11192977 + ... + 11194855.

It is an arithmetic number, because the mean of its divisors is an integer number (805313040).

Almost surely, 2^21033368164 is an apocalyptic number.

It is an amenable number.

21033368164 is a deficient number, since it is larger than the sum of its proper divisors (17621657756).

21033368164 is a wasteful number, since it uses less digits than its factorization.

21033368164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620 (or 2618 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 21033368164 in words is "twenty-one billion, thirty-three million, three hundred sixty-eight thousand, one hundred sixty-four".