20996198673 has 16 divisors (see below), whose sum is σ = 28977960960. Its totient is φ = 13511909376.

The previous prime is 20996198659. The next prime is 20996198681. The reversal of 20996198673 is 37689169902.

It is not a de Polignac number, because 20996198673 - 2⁹ = 20996198161 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20996198603) 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, 730608 + ... + 758801.

It is an arithmetic number, because the mean of its divisors is an integer number (1811122560).

Almost surely, 2^20996198673 is an apocalyptic number.

It is an amenable number.

20996198673 is a deficient number, since it is larger than the sum of its proper divisors (7981762287).

20996198673 is a wasteful number, since it uses less digits than its factorization.

20996198673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489576.

The product of its (nonzero) digits is 8817984, while the sum is 60.

The spelling of 20996198673 in words is "twenty billion, nine hundred ninety-six million, one hundred ninety-eight thousand, six hundred seventy-three".