18905039 has 8 divisors (see below), whose sum is σ = 19471200. Its totient is φ = 18341856.

The previous prime is 18905027. The next prime is 18905053. The reversal of 18905039 is 93050981.

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 18905039 - 2⁸ = 18904783 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 (18905539) 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, 21737 + ... + 22589.

It is an arithmetic number, because the mean of its divisors is an integer number (2433900).

Almost surely, 2^18905039 is an apocalyptic number.

18905039 is a deficient number, since it is larger than the sum of its proper divisors (566161).

18905039 is an equidigital number, since it uses as much as digits as its factorization.

18905039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 18905039 is about 4347.9925252926. The cubic root of 18905039 is about 266.3948711614.

The spelling of 18905039 in words is "eighteen million, nine hundred five thousand, thirty-nine".