20172984698 has 32 divisors (see below), whose sum is σ = 31491633600. Its totient is φ = 9680118784.

The previous prime is 20172984679. The next prime is 20172984701. The reversal of 20172984698 is 89648927102.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16022393 + ... + 16023651.

It is an arithmetic number, because the mean of its divisors is an integer number (984113550).

Almost surely, 2^20172984698 is an apocalyptic number.

20172984698 is a deficient number, since it is larger than the sum of its proper divisors (11318648902).

20172984698 is a wasteful number, since it uses less digits than its factorization.

20172984698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734.

The product of its (nonzero) digits is 3483648, while the sum is 56.

The spelling of 20172984698 in words is "twenty billion, one hundred seventy-two million, nine hundred eighty-four thousand, six hundred ninety-eight".