21333177813928 has 32 divisors (see below), whose sum is σ = 44581718347200. Its totient is φ = 9510766578432.

The previous prime is 21333177813917. The next prime is 21333177813931. The reversal of 21333177813928 is 82931877133312.

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, 4127934300 + ... + 4127939467.

It is an arithmetic number, because the mean of its divisors is an integer number (1393178698350).

Almost surely, 2^{21333177813928} is an apocalyptic number.

It is an amenable number.

21333177813928 is an abundant number, since it is smaller than the sum of its proper divisors (23248540533272).

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

21333177813928 is a wasteful number, since it uses less digits than its factorization.

21333177813928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8255873809 (or 8255873805 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 58.

The spelling of 21333177813928 in words is "twenty-one trillion, three hundred thirty-three billion, one hundred seventy-seven million, eight hundred thirteen thousand, nine hundred twenty-eight".