20098974721 has 16 divisors (see below), whose sum is σ = 23923365120. Its totient is φ = 16525978560.

The previous prime is 20098974719. The next prime is 20098974769. The reversal of 20098974721 is 12747989002.

It is not a de Polignac number, because 20098974721 - 2¹ = 20098974719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20098977721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528106 + ... + 564883.

It is an arithmetic number, because the mean of its divisors is an integer number (1495210320).

Almost surely, 2^20098974721 is an apocalyptic number.

It is an amenable number.

20098974721 is a deficient number, since it is larger than the sum of its proper divisors (3824390399).

20098974721 is a wasteful number, since it uses less digits than its factorization.

20098974721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093104.

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 20098974721 in words is "twenty billion, ninety-eight million, nine hundred seventy-four thousand, seven hundred twenty-one".