18786896 has 40 divisors (see below), whose sum is σ = 39655200. Its totient is φ = 8588160.

The previous prime is 18786881. The next prime is 18786907. The reversal of 18786896 is 69868781.

It is a super-2 number, since 2×18786896² = 705894922629632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7751 + ... + 9881.

It is an arithmetic number, because the mean of its divisors is an integer number (991380).

Almost surely, 2^18786896 is an apocalyptic number.

18786896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18786896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19827600).

18786896 is an abundant number, since it is smaller than the sum of its proper divisors (20868304).

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

18786896 is a wasteful number, since it uses less digits than its factorization.

18786896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187 (or 2181 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 53.

The square root of 18786896 is about 4334.3853082069. The cubic root of 18786896 is about 265.8387852338.

The spelling of 18786896 in words is "eighteen million, seven hundred eighty-six thousand, eight hundred ninety-six".