21367063128 has 32 divisors (see below), whose sum is σ = 53470450800. Its totient is φ = 7115315328.

The previous prime is 21367063093. The next prime is 21367063147. The reversal of 21367063128 is 82136076312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415123 + ... + 463746.

Almost surely, 2^21367063128 is an apocalyptic number.

It is an amenable number.

21367063128 is an abundant number, since it is smaller than the sum of its proper divisors (32103387672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21367063128 is a wasteful number, since it uses less digits than its factorization.

21367063128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879891 (or 879887 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 21367063128 in words is "twenty-one billion, three hundred sixty-seven million, sixty-three thousand, one hundred twenty-eight".