20950858188 has 36 divisors (see below), whose sum is σ = 57032893008. Its totient is φ = 6446417760.

The previous prime is 20950858163. The next prime is 20950858199. The reversal of 20950858188 is 88185805902.

It is a happy number.

20950858188 is a `hidden beast` number, since 2 + 0 + 9 + 50 + 8 + 581 + 8 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22382928 + ... + 22383863.

It is an arithmetic number, because the mean of its divisors is an integer number (1584247028).

Almost surely, 2^20950858188 is an apocalyptic number.

It is an amenable number.

20950858188 is an abundant number, since it is smaller than the sum of its proper divisors (36082034820).

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

20950858188 is a wasteful number, since it uses less digits than its factorization.

20950858188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44766814 (or 44766809 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 54.

The spelling of 20950858188 in words is "twenty billion, nine hundred fifty million, eight hundred fifty-eight thousand, one hundred eighty-eight".