20455958772 has 36 divisors (see below), whose sum is σ = 51759254820. Its totient is φ = 6811909632.

The previous prime is 20455958759. The next prime is 20455958791. The reversal of 20455958772 is 27785955402.

20455958772 is a `hidden beast` number, since 2 + 0 + 4 + 5 + 59 + 587 + 7 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5862352356 + 14593606416 = 76566^2 + 120804^2 .

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

It is a congruent number.

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, 243997 + ... + 316932.

Almost surely, 2^20455958772 is an apocalyptic number.

It is an amenable number.

20455958772 is an abundant number, since it is smaller than the sum of its proper divisors (31303296048).

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

20455958772 is a wasteful number, since it uses less digits than its factorization.

20455958772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561952 (or 561947 counting only the distinct ones).

The product of its (nonzero) digits is 7056000, while the sum is 54.

The spelling of 20455958772 in words is "twenty billion, four hundred fifty-five million, nine hundred fifty-eight thousand, seven hundred seventy-two".