18997084 has 6 divisors (see below), whose sum is σ = 33244904. Its totient is φ = 9498540.

The previous prime is 18997073. The next prime is 18997087. The reversal of 18997084 is 48079981.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18997087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2374632 + ... + 2374639.

Almost surely, 2^18997084 is an apocalyptic number.

It is an amenable number.

18997084 is a deficient number, since it is larger than the sum of its proper divisors (14247820).

18997084 is a wasteful number, since it uses less digits than its factorization.

18997084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749275 (or 4749273 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 18997084 is about 4358.5644425659. The cubic root of 18997084 is about 266.8265131927.

The spelling of 18997084 in words is "eighteen million, nine hundred ninety-seven thousand, eighty-four".