21364763165152 has 48 divisors (see below), whose sum is σ = 45890971988400. Its totient is φ = 9710136944640.

The previous prime is 21364763165071. The next prime is 21364763165297. The reversal of 21364763165152 is 25156136746312.

It is a self number, because there is not a number n which added to its sum of digits gives 21364763165152.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 434127 + ... + 6551182.

It is an arithmetic number, because the mean of its divisors is an integer number (956061916425).

Almost surely, 2^{21364763165152} is an apocalyptic number.

21364763165152 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21364763165152 is an abundant number, since it is smaller than the sum of its proper divisors (24526208823248).

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

21364763165152 is a wasteful number, since it uses less digits than its factorization.

21364763165152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6994019 (or 6994011 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 52.

The spelling of 21364763165152 in words is "twenty-one trillion, three hundred sixty-four billion, seven hundred sixty-three million, one hundred sixty-five thousand, one hundred fifty-two".