18020336 has 20 divisors (see below), whose sum is σ = 35226912. Its totient is φ = 8929536.

The previous prime is 18020333. The next prime is 18020347. The reversal of 18020336 is 63302081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18020333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3176 + ... + 6791.

Almost surely, 2^18020336 is an apocalyptic number.

18020336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18020336 is a deficient number, since it is larger than the sum of its proper divisors (17206576).

18020336 is a wasteful number, since it uses less digits than its factorization.

18020336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10088 (or 10082 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 18020336 is about 4245.0366311729. The cubic root of 18020336 is about 262.1727974559.

The spelling of 18020336 in words is "eighteen million, twenty thousand, three hundred thirty-six".