18974394 has 12 divisors (see below), whose sum is σ = 41111226. Its totient is φ = 6324792.

The previous prime is 18974383. The next prime is 18974399. The reversal of 18974394 is 49347981.

It can be written as a sum of positive squares in only one way, i.e., 16040025 + 2934369 = 4005^2 + 1713^2 .

It is not an unprimeable number, because it can be changed into a prime (18974399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 527049 + ... + 527084.

Almost surely, 2^18974394 is an apocalyptic number.

18974394 is an abundant number, since it is smaller than the sum of its proper divisors (22136832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18974394 is a wasteful number, since it uses less digits than its factorization.

18974394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054141 (or 1054138 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 18974394 is about 4355.9607436248. The cubic root of 18974394 is about 266.7202388896.

The spelling of 18974394 in words is "eighteen million, nine hundred seventy-four thousand, three hundred ninety-four".