18630436 has 24 divisors (see below), whose sum is σ = 37660896. Its totient is φ = 7969920.

The previous prime is 18630397. The next prime is 18630449. The reversal of 18630436 is 63403681.

It is a junction number, because it is equal to n+sod(n) for n = 18630398 and 18630407.

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, 11706 + ... + 13201.

It is an arithmetic number, because the mean of its divisors is an integer number (1569204).

Almost surely, 2^18630436 is an apocalyptic number.

It is an amenable number.

18630436 is an abundant number, since it is smaller than the sum of its proper divisors (19030460).

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

18630436 is a wasteful number, since it uses less digits than its factorization.

18630436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24939 (or 24937 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 18630436 is about 4316.2988775107. The cubic root of 18630436 is about 265.0987456852.

The spelling of 18630436 in words is "eighteen million, six hundred thirty thousand, four hundred thirty-six".