18049886 has 16 divisors (see below), whose sum is σ = 30177360. Its totient is φ = 8046720.

The previous prime is 18049883. The next prime is 18049891. The reversal of 18049886 is 68894081.

It is a happy number.

It is a super-2 number, since 2×18049886² = 651596769225992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18049883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13325 + ... + 14616.

It is an arithmetic number, because the mean of its divisors is an integer number (1886085).

Almost surely, 2^18049886 is an apocalyptic number.

18049886 is a deficient number, since it is larger than the sum of its proper divisors (12127474).

18049886 is a wasteful number, since it uses less digits than its factorization.

18049886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27979.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 18049886 is about 4248.5157408206. The cubic root of 18049886 is about 262.3160240743.

The spelling of 18049886 in words is "eighteen million, forty-nine thousand, eight hundred eighty-six".