21255203052204 has 24 divisors (see below), whose sum is σ = 54104153224128. Its totient is φ = 6440970621840.

The previous prime is 21255203052137. The next prime is 21255203052217. The reversal of 21255203052204 is 40225030255212.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80512132642 + ... + 80512132905.

It is an arithmetic number, because the mean of its divisors is an integer number (2254339717672).

Almost surely, 2^{21255203052204} is an apocalyptic number.

It is an amenable number.

21255203052204 is an abundant number, since it is smaller than the sum of its proper divisors (32848950171924).

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

21255203052204 is a wasteful number, since it uses less digits than its factorization.

21255203052204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161024265565 (or 161024265563 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 33.

The spelling of 21255203052204 in words is "twenty-one trillion, two hundred fifty-five billion, two hundred three million, fifty-two thousand, two hundred four".