21132613068 has 48 divisors (see below), whose sum is σ = 57032613120. Its totient is φ = 5965141824.

The previous prime is 21132613057. The next prime is 21132613087. The reversal of 21132613068 is 86031623112.

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, 1508563 + ... + 1522506.

It is an arithmetic number, because the mean of its divisors is an integer number (1188179440).

Almost surely, 2^21132613068 is an apocalyptic number.

21132613068 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21132613068 is an abundant number, since it is smaller than the sum of its proper divisors (35900000052).

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

21132613068 is a wasteful number, since it uses less digits than its factorization.

21132613068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3031166 (or 3031164 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 21132613068 in words is "twenty-one billion, one hundred thirty-two million, six hundred thirteen thousand, sixty-eight".