18869992 has 16 divisors (see below), whose sum is σ = 35747460. Its totient is φ = 9337344.

The previous prime is 18869957. The next prime is 18870011. The reversal of 18869992 is 29996881.

It can be written as a sum of positive squares in 2 ways, for example, as 18783556 + 86436 = 4334^2 + 294^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11383 + ... + 12934.

Almost surely, 2^18869992 is an apocalyptic number.

It is an amenable number.

18869992 is a deficient number, since it is larger than the sum of its proper divisors (16877468).

18869992 is a wasteful number, since it uses less digits than its factorization.

18869992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24420 (or 24416 counting only the distinct ones).

The product of its digits is 559872, while the sum is 52.

The square root of 18869992 is about 4343.9604049761. The cubic root of 18869992 is about 266.2301511208.

The spelling of 18869992 in words is "eighteen million, eight hundred sixty-nine thousand, nine hundred ninety-two".