18974492 has 6 divisors (see below), whose sum is σ = 33205368. Its totient is φ = 9487244.

The previous prime is 18974491. The next prime is 18974507. The reversal of 18974492 is 29447981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18974491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2371808 + ... + 2371815.

It is an arithmetic number, because the mean of its divisors is an integer number (5534228).

Almost surely, 2^18974492 is an apocalyptic number.

It is an amenable number.

18974492 is a deficient number, since it is larger than the sum of its proper divisors (14230876).

18974492 is a wasteful number, since it uses less digits than its factorization.

18974492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4743627 (or 4743625 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 18974492 is about 4355.9719925638. The cubic root of 18974492 is about 266.7206980793.

The spelling of 18974492 in words is "eighteen million, nine hundred seventy-four thousand, four hundred ninety-two".