20996796898 has 16 divisors (see below), whose sum is σ = 39266737344. Its totient is φ = 8180570160.

The previous prime is 20996796893. The next prime is 20996796911. The reversal of 20996796898 is 89869769902.

It is a self number, because there is not a number n which added to its sum of digits gives 20996796898.

It is not an unprimeable number, because it can be changed into a prime (20996796893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68171265 + ... + 68171572.

It is an arithmetic number, because the mean of its divisors is an integer number (2454171084).

Almost surely, 2^20996796898 is an apocalyptic number.

20996796898 is a deficient number, since it is larger than the sum of its proper divisors (18269940446).

20996796898 is a wasteful number, since it uses less digits than its factorization.

20996796898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136342857.

The product of its (nonzero) digits is 211631616, while the sum is 73.

The spelling of 20996796898 in words is "twenty billion, nine hundred ninety-six million, seven hundred ninety-six thousand, eight hundred ninety-eight".