18494774 has 16 divisors (see below), whose sum is σ = 28479600. Its totient is φ = 9004320.

The previous prime is 18494767. The next prime is 18494797. The reversal of 18494774 is 47749481.

It is a super-2 number, since 2×18494774² = 684113330622152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15209 + ... + 16379.

It is an arithmetic number, because the mean of its divisors is an integer number (1779975).

Almost surely, 2^18494774 is an apocalyptic number.

18494774 is a deficient number, since it is larger than the sum of its proper divisors (9984826).

18494774 is a wasteful number, since it uses less digits than its factorization.

18494774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375.

The product of its digits is 225792, while the sum is 44.

The square root of 18494774 is about 4300.5550804518. Note that the first 3 decimals coincide. The cubic root of 18494774 is about 264.4537174103.

It can be divided in two parts, 1849477 and 4, that added together give a palindrome (1849481).

The spelling of 18494774 in words is "eighteen million, four hundred ninety-four thousand, seven hundred seventy-four".