18416636 has 24 divisors (see below), whose sum is σ = 37109856. Its totient is φ = 7833600.

The previous prime is 18416617. The next prime is 18416641. The reversal of 18416636 is 63661481.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18416596 and 18416605.

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, 1436 + ... + 6236.

It is an arithmetic number, because the mean of its divisors is an integer number (1546244).

Almost surely, 2^18416636 is an apocalyptic number.

It is an amenable number.

18416636 is an abundant number, since it is smaller than the sum of its proper divisors (18693220).

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

18416636 is a wasteful number, since it uses less digits than its factorization.

18416636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4949 (or 4947 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 18416636 is about 4291.4608235425. The cubic root of 18416636 is about 264.0807642398.

The spelling of 18416636 in words is "eighteen million, four hundred sixteen thousand, six hundred thirty-six".