18359018 has 4 divisors (see below), whose sum is σ = 27538530. Its totient is φ = 9179508.

The previous prime is 18358973. The next prime is 18359023. The reversal of 18359018 is 81095381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81095381 = 3389 ⋅23929.

It can be written as a sum of positive squares in only one way, i.e., 18258529 + 100489 = 4273^2 + 317^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4589753 + ... + 4589756.

Almost surely, 2^18359018 is an apocalyptic number.

18359018 is a deficient number, since it is larger than the sum of its proper divisors (9179512).

18359018 is an equidigital number, since it uses as much as digits as its factorization.

18359018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9179511.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 18359018 is about 4284.7424660066. The cubic root of 18359018 is about 263.8050768832.

The spelling of 18359018 in words is "eighteen million, three hundred fifty-nine thousand, eighteen".