21850929477252 has 72 divisors (see below), whose sum is σ = 55263703272960. Its totient is φ = 7279765954560.

The previous prime is 21850929477233. The next prime is 21850929477271. The reversal of 21850929477252 is 25277492905812.

21850929477252 is a `hidden beast` number, since 2 + 1 + 8 + 50 + 92 + 9 + 477 + 25 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (21850929477233) and next prime (21850929477271).

It is a self number, because there is not a number n which added to its sum of digits gives 21850929477252.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 751832473 + ... + 751861535.

Almost surely, 2^{21850929477252} is an apocalyptic number.

It is an amenable number.

21850929477252 is an abundant number, since it is smaller than the sum of its proper divisors (33412773795708).

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

21850929477252 is a wasteful number, since it uses less digits than its factorization.

21850929477252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39473 (or 39468 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 63.

The spelling of 21850929477252 in words is "twenty-one trillion, eight hundred fifty billion, nine hundred twenty-nine million, four hundred seventy-seven thousand, two hundred fifty-two".