20522974802 has 18 divisors (see below), whose sum is σ = 33841141509. Its totient is φ = 9327611920.

The previous prime is 20522974783. The next prime is 20522974807. The reversal of 20522974802 is 20847922502.

20522974802 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 17630793961 + 2892180841 = 132781^2 + 53779^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=101299.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20522974802.

It is not an unprimeable number, because it can be changed into a prime (20522974807) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2223974 + ... + 2233182.

Almost surely, 2^20522974802 is an apocalyptic number.

20522974802 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20522974802 is a deficient number, since it is larger than the sum of its proper divisors (13318166707).

20522974802 is an frugal number, since it uses more digits than its factorization.

20522974802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18442 (or 9222 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 20522974802 in words is "twenty billion, five hundred twenty-two million, nine hundred seventy-four thousand, eight hundred two".