18886981292 has 6 divisors (see below), whose sum is σ = 33052217268. Its totient is φ = 9443490644.

The previous prime is 18886981247. The next prime is 18886981301. The reversal of 18886981292 is 29218968881.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2360872658 + ... + 2360872665.

It is an arithmetic number, because the mean of its divisors is an integer number (5508702878).

Almost surely, 2^18886981292 is an apocalyptic number.

It is an amenable number.

18886981292 is a deficient number, since it is larger than the sum of its proper divisors (14165235976).

18886981292 is a wasteful number, since it uses less digits than its factorization.

18886981292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4721745327 (or 4721745325 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 62.

The spelling of 18886981292 in words is "eighteen billion, eight hundred eighty-six million, nine hundred eighty-one thousand, two hundred ninety-two".