18456836 has 6 divisors (see below), whose sum is σ = 32299470. Its totient is φ = 9228416.

The previous prime is 18456799. The next prime is 18456857. The reversal of 18456836 is 63865481.

It can be written as a sum of positive squares in only one way, i.e., 17724100 + 732736 = 4210^2 + 856^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18456793 and 18456802.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2307101 + ... + 2307108.

It is an arithmetic number, because the mean of its divisors is an integer number (5383245).

Almost surely, 2^18456836 is an apocalyptic number.

It is an amenable number.

18456836 is a deficient number, since it is larger than the sum of its proper divisors (13842634).

18456836 is a wasteful number, since it uses less digits than its factorization.

18456836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4614213 (or 4614211 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 18456836 is about 4296.1419902047. The cubic root of 18456836 is about 264.2727705651.

The spelling of 18456836 in words is "eighteen million, four hundred fifty-six thousand, eight hundred thirty-six".