18465986 has 32 divisors (see below), whose sum is σ = 36357120. Its totient is φ = 6814800.

The previous prime is 18465973. The next prime is 18465989. The reversal of 18465986 is 68956481.

It is a self number, because there is not a number n which added to its sum of digits gives 18465986.

It is not an unprimeable number, because it can be changed into a prime (18465989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230 + ... + 6081.

It is an arithmetic number, because the mean of its divisors is an integer number (1136160).

Almost surely, 2^18465986 is an apocalyptic number.

18465986 is a deficient number, since it is larger than the sum of its proper divisors (17891134).

18465986 is a wasteful number, since it uses less digits than its factorization.

18465986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6350.

The product of its digits is 414720, while the sum is 47.

The square root of 18465986 is about 4297.2067671919. The cubic root of 18465986 is about 264.3164345381.

The spelling of 18465986 in words is "eighteen million, four hundred sixty-five thousand, nine hundred eighty-six".