18260939 has 8 divisors (see below), whose sum is σ = 18756672. Its totient is φ = 17768520.

The previous prime is 18260933. The next prime is 18260947. The reversal of 18260939 is 93906281.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18260939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18260933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13592 + ... + 14874.

It is an arithmetic number, because the mean of its divisors is an integer number (2344584).

Almost surely, 2^18260939 is an apocalyptic number.

18260939 is a deficient number, since it is larger than the sum of its proper divisors (495733).

18260939 is a wasteful number, since it uses less digits than its factorization.

18260939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 18260939 is about 4273.2819939714. The cubic root of 18260939 is about 263.3344643794.

The spelling of 18260939 in words is "eighteen million, two hundred sixty thousand, nine hundred thirty-nine".