21365107733016 has 80 divisors (see below), whose sum is σ = 59964964068240. Its totient is φ = 7107078853440.

The previous prime is 21365107732981. The next prime is 21365107733077. The reversal of 21365107733016 is 61033770156312.

21365107733016 is a `hidden beast` number, since 2 + 1 + 36 + 510 + 7 + 73 + 30 + 1 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33535395 + ... + 34166546.

It is an arithmetic number, because the mean of its divisors is an integer number (749562050853).

Almost surely, 2^{21365107733016} is an apocalyptic number.

It is an amenable number.

21365107733016 is an abundant number, since it is smaller than the sum of its proper divisors (38599856335224).

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

21365107733016 is a wasteful number, since it uses less digits than its factorization.

21365107733016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67702446 (or 67702433 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 45.

Adding to 21365107733016 its reverse (61033770156312), we get a palindrome (82398877889328).

The spelling of 21365107733016 in words is "twenty-one trillion, three hundred sixty-five billion, one hundred seven million, seven hundred thirty-three thousand, sixteen".