18249836 has 12 divisors (see below), whose sum is σ = 34840680. Its totient is φ = 8295360.

The previous prime is 18249817. The next prime is 18249841. The reversal of 18249836 is 63894281.

It is a junction number, because it is equal to n+sod(n) for n = 18249793 and 18249802.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207341 + ... + 207428.

It is an arithmetic number, because the mean of its divisors is an integer number (2903390).

Almost surely, 2^18249836 is an apocalyptic number.

It is an amenable number.

18249836 is a deficient number, since it is larger than the sum of its proper divisors (16590844).

18249836 is a wasteful number, since it uses less digits than its factorization.

18249836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414784 (or 414782 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 18249836 is about 4271.9826778675. The cubic root of 18249836 is about 263.2810827628.

The spelling of 18249836 in words is "eighteen million, two hundred forty-nine thousand, eight hundred thirty-six".