21624070255 has 32 divisors (see below), whose sum is σ = 27340214400. Its totient is φ = 16394918400.

The previous prime is 21624070249. The next prime is 21624070291. The reversal of 21624070255 is 55207042612.

It is not a de Polignac number, because 21624070255 - 2²⁵ = 21590515823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21624070255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4782886 + ... + 4787404.

It is an arithmetic number, because the mean of its divisors is an integer number (854381700).

Almost surely, 2^21624070255 is an apocalyptic number.

21624070255 is a deficient number, since it is larger than the sum of its proper divisors (5716144145).

21624070255 is a wasteful number, since it uses less digits than its factorization.

21624070255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5155.

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 21624070255 in words is "twenty-one billion, six hundred twenty-four million, seventy thousand, two hundred fifty-five".