20297979802 has 16 divisors (see below), whose sum is σ = 32512896000. Its totient is φ = 9482926320.

The previous prime is 20297979749. The next prime is 20297979811. The reversal of 20297979802 is 20897979202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5642802 + ... + 5646397.

It is an arithmetic number, because the mean of its divisors is an integer number (2032056000).

Almost surely, 2^20297979802 is an apocalyptic number.

20297979802 is a deficient number, since it is larger than the sum of its proper divisors (12214916198).

20297979802 is a wasteful number, since it uses less digits than its factorization.

20297979802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11289261.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The spelling of 20297979802 in words is "twenty billion, two hundred ninety-seven million, nine hundred seventy-nine thousand, eight hundred two".