18630136 has 32 divisors (see below), whose sum is σ = 40681440. Its totient is φ = 7832448.

The previous prime is 18630121. The next prime is 18630169. The reversal of 18630136 is 63103681.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 171 + ... + 6106.

It is an arithmetic number, because the mean of its divisors is an integer number (1271295).

Almost surely, 2^18630136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18630136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20340720).

18630136 is an abundant number, since it is smaller than the sum of its proper divisors (22051304).

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

18630136 is a wasteful number, since it uses less digits than its factorization.

18630136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6343 (or 6339 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 18630136 is about 4316.2641253751. The cubic root of 18630136 is about 265.0973227439.

The spelling of 18630136 in words is "eighteen million, six hundred thirty thousand, one hundred thirty-six".