18740039 has 4 divisors (see below), whose sum is σ = 18750120. Its totient is φ = 18729960.

The previous prime is 18740021. The next prime is 18740053. The reversal of 18740039 is 93004781.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18740039 - 2⁸ = 18739783 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18739987 and 18740014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18740339) 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, 1352 + ... + 6269.

It is an arithmetic number, because the mean of its divisors is an integer number (4687530).

Almost surely, 2^18740039 is an apocalyptic number.

18740039 is a deficient number, since it is larger than the sum of its proper divisors (10081).

18740039 is an equidigital number, since it uses as much as digits as its factorization.

18740039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10080.

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

The square root of 18740039 is about 4328.9766689138. The cubic root of 18740039 is about 265.6175888867.

The spelling of 18740039 in words is "eighteen million, seven hundred forty thousand, thirty-nine".