18140736 has 28 divisors (see below), whose sum is σ = 47997872. Its totient is φ = 6046848.

The previous prime is 18140723. The next prime is 18140741. The reversal of 18140736 is 63704181.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47050 + ... + 47433.

Almost surely, 2^18140736 is an apocalyptic number.

18140736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18140736 is an abundant number, since it is smaller than the sum of its proper divisors (29857136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18140736 is an equidigital number, since it uses as much as digits as its factorization.

18140736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94498 (or 94488 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 18140736 is about 4259.1942900037. The cubic root of 18140736 is about 262.7553904482.

The spelling of 18140736 in words is "eighteen million, one hundred forty thousand, seven hundred thirty-six".