20113955772 has 96 divisors (see below), whose sum is σ = 47981606400. Its totient is φ = 6557075712.

The previous prime is 20113955717. The next prime is 20113955801. The reversal of 20113955772 is 27755931102.

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, 50664678 + ... + 50665074.

It is an arithmetic number, because the mean of its divisors is an integer number (499808400).

Almost surely, 2^20113955772 is an apocalyptic number.

It is an amenable number.

20113955772 is an abundant number, since it is smaller than the sum of its proper divisors (27867650628).

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

20113955772 is a wasteful number, since it uses less digits than its factorization.

20113955772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915 (or 913 counting only the distinct ones).

The product of its (nonzero) digits is 132300, while the sum is 42.

The spelling of 20113955772 in words is "twenty billion, one hundred thirteen million, nine hundred fifty-five thousand, seven hundred seventy-two".