21633417892828 has 12 divisors (see below), whose sum is σ = 43266835785712. Its totient is φ = 9271464811200.

The previous prime is 21633417892771. The next prime is 21633417892829. The reversal of 21633417892828 is 82829871433612.

21633417892828 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21633417892828.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21633417892829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386311033773 + ... + 386311033828.

Almost surely, 2^{21633417892828} is an apocalyptic number.

21633417892828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21633417892828 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21633417892828 is a wasteful number, since it uses less digits than its factorization.

21633417892828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772622067612 (or 772622067610 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 64.

The spelling of 21633417892828 in words is "twenty-one trillion, six hundred thirty-three billion, four hundred seventeen million, eight hundred ninety-two thousand, eight hundred twenty-eight".