18978979282202 has 32 divisors (see below), whose sum is σ = 29217350249472. Its totient is φ = 9241190958384.

The previous prime is 18978979282177. The next prime is 18978979282217. The reversal of 18978979282202 is 20228297987981.

It is a self number, because there is not a number n which added to its sum of digits gives 18978979282202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127025513 + ... + 127174835.

It is an arithmetic number, because the mean of its divisors is an integer number (913042195296).

Almost surely, 2^{18978979282202} is an apocalyptic number.

18978979282202 is a deficient number, since it is larger than the sum of its proper divisors (10238370967270).

18978979282202 is a wasteful number, since it uses less digits than its factorization.

18978979282202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153762.

The product of its (nonzero) digits is 292626432, while the sum is 74.

The spelling of 18978979282202 in words is "eighteen trillion, nine hundred seventy-eight billion, nine hundred seventy-nine million, two hundred eighty-two thousand, two hundred two".