20523189772 has 12 divisors (see below), whose sum is σ = 36285846520. Its totient is φ = 10155805056.

The previous prime is 20523189763. The next prime is 20523189773. The reversal of 20523189772 is 27798132502.

It is not an unprimeable number, because it can be changed into a prime (20523189773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26447022 + ... + 26447797.

Almost surely, 2^20523189772 is an apocalyptic number.

It is an amenable number.

20523189772 is a deficient number, since it is larger than the sum of its proper divisors (15762656748).

20523189772 is a wasteful number, since it uses less digits than its factorization.

20523189772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52894920 (or 52894918 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 20523189772 in words is "twenty billion, five hundred twenty-three million, one hundred eighty-nine thousand, seven hundred seventy-two".