20998164011 has 16 divisors (see below), whose sum is σ = 23295984000. Its totient is φ = 18766313280.

The previous prime is 20998164007. The next prime is 20998164037. The reversal of 20998164011 is 11046189902.

It is not a de Polignac number, because 20998164011 - 2² = 20998164007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20998164011.

It is not an unprimeable number, because it can be changed into a prime (20998164001) 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, 339215 + ... + 396311.

It is an arithmetic number, because the mean of its divisors is an integer number (1455999000).

Almost surely, 2^20998164011 is an apocalyptic number.

20998164011 is a deficient number, since it is larger than the sum of its proper divisors (2297819989).

20998164011 is a wasteful number, since it uses less digits than its factorization.

20998164011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57674.

The product of its (nonzero) digits is 31104, while the sum is 41.

The spelling of 20998164011 in words is "twenty billion, nine hundred ninety-eight million, one hundred sixty-four thousand, eleven".