20394324722 has 6 divisors (see below), whose sum is σ = 30591790029. Its totient is φ = 10197061380.

The previous prime is 20394324721. The next prime is 20394324749. The reversal of 20394324722 is 22742349302.

It can be written as a sum of positive squares in 2 ways, for example, as 11913940801 + 8480383921 = 109151^2 + 92089^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=100981.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20394324721) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 151472 + ... + 252452.

Almost surely, 2^20394324722 is an apocalyptic number.

20394324722 is a deficient number, since it is larger than the sum of its proper divisors (10197465307).

20394324722 is an frugal number, since it uses more digits than its factorization.

20394324722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201964 (or 100983 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 38.

The spelling of 20394324722 in words is "twenty billion, three hundred ninety-four million, three hundred twenty-four thousand, seven hundred twenty-two".