18748039 has 8 divisors (see below), whose sum is σ = 18991008. Its totient is φ = 18506880.

The previous prime is 18748033. The next prime is 18748049. The reversal of 18748039 is 93084781.

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 18748039 - 2¹⁵ = 18715271 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18747992 and 18748010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18748033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38254 + ... + 38740.

It is an arithmetic number, because the mean of its divisors is an integer number (2373876).

Almost surely, 2^18748039 is an apocalyptic number.

18748039 is a deficient number, since it is larger than the sum of its proper divisors (242969).

18748039 is a wasteful number, since it uses less digits than its factorization.

18748039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 18748039 is about 4329.9005762257. The cubic root of 18748039 is about 265.6553803130.

The spelling of 18748039 in words is "eighteen million, seven hundred forty-eight thousand, thirty-nine".