18994245 has 16 divisors (see below), whose sum is σ = 30448320. Its totient is φ = 10111104.

The previous prime is 18994201. The next prime is 18994273. The reversal of 18994245 is 54249981.

It is not a de Polignac number, because 18994245 - 2⁶ = 18994181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18994197 and 18994206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11001 + ... + 12609.

It is an arithmetic number, because the mean of its divisors is an integer number (1903020).

Almost surely, 2^18994245 is an apocalyptic number.

18994245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18994245 is a deficient number, since it is larger than the sum of its proper divisors (11454075).

18994245 is a wasteful number, since it uses less digits than its factorization.

18994245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404.

The product of its digits is 103680, while the sum is 42.

The square root of 18994245 is about 4358.2387497704. The cubic root of 18994245 is about 266.8132206578.

The spelling of 18994245 in words is "eighteen million, nine hundred ninety-four thousand, two hundred forty-five".