18074309 has 8 divisors (see below), whose sum is σ = 19860960. Its totient is φ = 16311600.

The previous prime is 18074293. The next prime is 18074323. The reversal of 18074309 is 90347081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18074309 - 2⁴ = 18074293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18074359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4382 + ... + 7439.

It is an arithmetic number, because the mean of its divisors is an integer number (2482620).

Almost surely, 2^18074309 is an apocalyptic number.

It is an amenable number.

18074309 is a deficient number, since it is larger than the sum of its proper divisors (1786651).

18074309 is a wasteful number, since it uses less digits than its factorization.

18074309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11971.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 18074309 is about 4251.3890671168. The cubic root of 18074309 is about 262.4342825663.

It can be divided in two parts, 1807 and 4309, that added together give a palindrome (6116).

The spelling of 18074309 in words is "eighteen million, seventy-four thousand, three hundred nine".