18324986 has 4 divisors (see below), whose sum is σ = 27487482. Its totient is φ = 9162492.

The previous prime is 18324973. The next prime is 18325001. The reversal of 18324986 is 68942381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68942381 = 7079 ⋅9739.

It can be written as a sum of positive squares in only one way, i.e., 18105025 + 219961 = 4255^2 + 469^2 .

It is a super-2 number, since 2×18324986² = 671610223800392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4581245 + ... + 4581248.

Almost surely, 2^18324986 is an apocalyptic number.

18324986 is a deficient number, since it is larger than the sum of its proper divisors (9162496).

18324986 is an equidigital number, since it uses as much as digits as its factorization.

18324986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9162495.

The product of its digits is 82944, while the sum is 41.

The square root of 18324986 is about 4280.7693233810. The cubic root of 18324986 is about 263.6419714369.

The spelling of 18324986 in words is "eighteen million, three hundred twenty-four thousand, nine hundred eighty-six".