18689236 has 12 divisors (see below), whose sum is σ = 34427680. Its totient is φ = 8852760.

The previous prime is 18689233. The next prime is 18689243. The reversal of 18689236 is 63298681.

It is a junction number, because it is equal to n+sod(n) for n = 18689192 and 18689201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18689233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122880 + ... + 123031.

Almost surely, 2^18689236 is an apocalyptic number.

It is an amenable number.

18689236 is a deficient number, since it is larger than the sum of its proper divisors (15738444).

18689236 is a wasteful number, since it uses less digits than its factorization.

18689236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245934 (or 245932 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 18689236 is about 4323.1049027291. The cubic root of 18689236 is about 265.3773477876.

The spelling of 18689236 in words is "eighteen million, six hundred eighty-nine thousand, two hundred thirty-six".