21133683978804 has 96 divisors (see below), whose sum is σ = 54888623328000. Its totient is φ = 7032017420928.

The previous prime is 21133683978793. The next prime is 21133683978871. The reversal of 21133683978804 is 40887938633112.

21133683978804 is a `hidden beast` number, since 211 + 336 + 8 + 3 + 9 + 7 + 8 + 80 + 4 = 666.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 532194102 + ... + 532233810.

It is an arithmetic number, because the mean of its divisors is an integer number (571756493000).

Almost surely, 2^{21133683978804} is an apocalyptic number.

It is an amenable number.

21133683978804 is an abundant number, since it is smaller than the sum of its proper divisors (33754939349196).

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

21133683978804 is a wasteful number, since it uses less digits than its factorization.

21133683978804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48374 (or 48366 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 63.

The spelling of 21133683978804 in words is "twenty-one trillion, one hundred thirty-three billion, six hundred eighty-three million, nine hundred seventy-eight thousand, eight hundred four".