18040336 has 20 divisors (see below), whose sum is σ = 35154000. Its totient is φ = 8968352.

The previous prime is 18040333. The next prime is 18040387. The reversal of 18040336 is 63304081.

It is a self number, because there is not a number n which added to its sum of digits gives 18040336.

It is not an unprimeable number, because it can be changed into a prime (18040331) 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, 286 + ... + 6013.

It is an arithmetic number, because the mean of its divisors is an integer number (1757700).

Almost surely, 2^18040336 is an apocalyptic number.

18040336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18040336 is a deficient number, since it is larger than the sum of its proper divisors (17113664).

18040336 is a wasteful number, since it uses less digits than its factorization.

18040336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6486 (or 6480 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 18040336 is about 4247.3916701901. The cubic root of 18040336 is about 262.2697530531.

The spelling of 18040336 in words is "eighteen million, forty thousand, three hundred thirty-six".