21250250216604 has 72 divisors (see below), whose sum is σ = 54859821219840. Its totient is φ = 6932576940192.

The previous prime is 21250250216599. The next prime is 21250250216633. The reversal of 21250250216604 is 40661205205212.

21250250216604 is a `hidden beast` number, since 2 + 1 + 2 + 5 + 0 + 25 + 0 + 21 + 6 + 604 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 142430757 + ... + 142579875.

Almost surely, 2^{21250250216604} is an apocalyptic number.

It is an amenable number.

21250250216604 is an abundant number, since it is smaller than the sum of its proper divisors (33609571003236).

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

21250250216604 is a wasteful number, since it uses less digits than its factorization.

21250250216604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233399 (or 233394 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 21250250216604 in words is "twenty-one trillion, two hundred fifty billion, two hundred fifty million, two hundred sixteen thousand, six hundred four".