21262102165136 has 20 divisors (see below), whose sum is σ = 47080369080192. Its totient is φ = 9112329499296.

The previous prime is 21262102165123. The next prime is 21262102165163. The reversal of 21262102165136 is 63156120126212.

It is a self number, because there is not a number n which added to its sum of digits gives 21262102165136.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94920098840 + ... + 94920099063.

Almost surely, 2^{21262102165136} is an apocalyptic number.

It is an amenable number.

21262102165136 is an abundant number, since it is smaller than the sum of its proper divisors (25818266915056).

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

21262102165136 is a wasteful number, since it uses less digits than its factorization.

21262102165136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189840197918 (or 189840197912 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 21262102165136 in words is "twenty-one trillion, two hundred sixty-two billion, one hundred two million, one hundred sixty-five thousand, one hundred thirty-six".