20975434724 has 12 divisors (see below), whose sum is σ = 36727891200. Its totient is φ = 10481751528.

The previous prime is 20975434709. The next prime is 20975434741. The reversal of 20975434724 is 42743457902.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1483544 + ... + 1497615.

It is an arithmetic number, because the mean of its divisors is an integer number (3060657600).

Almost surely, 2^20975434724 is an apocalyptic number.

It is an amenable number.

20975434724 is a deficient number, since it is larger than the sum of its proper divisors (15752456476).

20975434724 is a wasteful number, since it uses less digits than its factorization.

20975434724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2982922 (or 2982920 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 47.

The spelling of 20975434724 in words is "twenty billion, nine hundred seventy-five million, four hundred thirty-four thousand, seven hundred twenty-four".