20125718322255 has 48 divisors (see below), whose sum is σ = 42934865762880. Its totient is φ = 8492610806784.

The previous prime is 20125718322247. The next prime is 20125718322287. The reversal of 20125718322255 is 55222381752102.

It is a happy number.

20125718322255 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 5 + 71 + 8 + 322 + 255 = 666.

It is not a de Polignac number, because 20125718322255 - 2³ = 20125718322247 is a prime.

It is a super-2 number, since 2×20125718322255² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20125718322255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2457348570 + ... + 2457356759.

It is an arithmetic number, because the mean of its divisors is an integer number (894476370060).

Almost surely, 2^{20125718322255} is an apocalyptic number.

20125718322255 is an abundant number, since it is smaller than the sum of its proper divisors (22809147440625).

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

20125718322255 is a wasteful number, since it uses less digits than its factorization.

20125718322255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4914705360 (or 4914705357 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 45.

The spelling of 20125718322255 in words is "twenty trillion, one hundred twenty-five billion, seven hundred eighteen million, three hundred twenty-two thousand, two hundred fifty-five".