18874694 has 4 divisors (see below), whose sum is σ = 28312044. Its totient is φ = 9437346.

The previous prime is 18874649. The next prime is 18874703. The reversal of 18874694 is 49647881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49647881 = 139 ⋅357179.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4718672 + ... + 4718675.

It is an arithmetic number, because the mean of its divisors is an integer number (7078011).

Almost surely, 2^18874694 is an apocalyptic number.

18874694 is a deficient number, since it is larger than the sum of its proper divisors (9437350).

18874694 is an equidigital number, since it uses as much as digits as its factorization.

18874694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9437349.

The product of its digits is 387072, while the sum is 47.

The square root of 18874694 is about 4344.5015824603. The cubic root of 18874694 is about 266.2522622450.

The spelling of 18874694 in words is "eighteen million, eight hundred seventy-four thousand, six hundred ninety-four".