18994715 has 4 divisors (see below), whose sum is σ = 22793664. Its totient is φ = 15195768.

The previous prime is 18994709. The next prime is 18994741. The reversal of 18994715 is 51749981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18994715 - 2¹² = 18990619 is a prime.

It is a Duffinian number.

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, 1899467 + ... + 1899476.

It is an arithmetic number, because the mean of its divisors is an integer number (5698416).

Almost surely, 2^18994715 is an apocalyptic number.

18994715 is a deficient number, since it is larger than the sum of its proper divisors (3798949).

18994715 is an equidigital number, since it uses as much as digits as its factorization.

18994715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3798948.

The product of its digits is 90720, while the sum is 44.

The square root of 18994715 is about 4358.2926703011. The cubic root of 18994715 is about 266.8154213450.

The spelling of 18994715 in words is "eighteen million, nine hundred ninety-four thousand, seven hundred fifteen".