21572861136204 has 192 divisors, whose sum is σ = 59332416675840. Its totient is φ = 5972606115840.

The previous prime is 21572861136187. The next prime is 21572861136221. The reversal of 21572861136204 is 40263116827512.

It is an interprime number because it is at equal distance from previous prime (21572861136187) and next prime (21572861136221).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3089336497 + ... + 3089343479.

It is an arithmetic number, because the mean of its divisors is an integer number (309023003520).

Almost surely, 2^{21572861136204} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21572861136204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29666208337920).

21572861136204 is an abundant number, since it is smaller than the sum of its proper divisors (37759555539636).

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

21572861136204 is a wasteful number, since it uses less digits than its factorization.

21572861136204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13700 (or 13698 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 21572861136204 in words is "twenty-one trillion, five hundred seventy-two billion, eight hundred sixty-one million, one hundred thirty-six thousand, two hundred four".