18974836 has 6 divisors (see below), whose sum is σ = 33205970. Its totient is φ = 9487416.

The previous prime is 18974833. The next prime is 18974881. The reversal of 18974836 is 63847981.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18974736 + 100 = 4356^2 + 10^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18974833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2371851 + ... + 2371858.

Almost surely, 2^18974836 is an apocalyptic number.

It is an amenable number.

18974836 is a deficient number, since it is larger than the sum of its proper divisors (14231134).

18974836 is a wasteful number, since it uses less digits than its factorization.

18974836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4743713 (or 4743711 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 18974836 is about 4356.0114784054. The cubic root of 18974836 is about 266.7223099163.

The spelling of 18974836 in words is "eighteen million, nine hundred seventy-four thousand, eight hundred thirty-six".