20522020672 has 56 divisors (see below), whose sum is σ = 41374177856. Its totient is φ = 10097353728.

The previous prime is 20522020667. The next prime is 20522020721. The reversal of 20522020672 is 27602022502.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20522020672.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5585428 + ... + 5589100.

Almost surely, 2^20522020672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20522020672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20687088928).

20522020672 is an abundant number, since it is smaller than the sum of its proper divisors (20852157184).

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

20522020672 is a wasteful number, since it uses less digits than its factorization.

20522020672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5055 (or 5045 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The spelling of 20522020672 in words is "twenty billion, five hundred twenty-two million, twenty thousand, six hundred seventy-two".