18636996 has 48 divisors (see below), whose sum is σ = 50118656. Its totient is φ = 5279904.

The previous prime is 18636953. The next prime is 18637009. The reversal of 18636996 is 69963681.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9795 + ... + 11541.

Almost surely, 2^18636996 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 18636996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25059328).

18636996 is an abundant number, since it is smaller than the sum of its proper divisors (31481660).

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

18636996 is a wasteful number, since it uses less digits than its factorization.

18636996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888 (or 1886 counting only the distinct ones).

The product of its digits is 419904, while the sum is 48.

The square root of 18636996 is about 4317.0587209349. The cubic root of 18636996 is about 265.1298568500.

The spelling of 18636996 in words is "eighteen million, six hundred thirty-six thousand, nine hundred ninety-six".