18942339 has 8 divisors (see below), whose sum is σ = 27199312. Its totient is φ = 11656800.

The previous prime is 18942337. The next prime is 18942349. The reversal of 18942339 is 93324981.

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

It is not a de Polignac number, because 18942339 - 2¹ = 18942337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 485701 = 18942339 / (1 + 8 + 9 + 4 + 2 + 3 + 3 + 9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18942297 and 18942306.

It is not an unprimeable number, because it can be changed into a prime (18942337) 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, 242812 + ... + 242889.

It is an arithmetic number, because the mean of its divisors is an integer number (3399914).

Almost surely, 2^18942339 is an apocalyptic number.

18942339 is a deficient number, since it is larger than the sum of its proper divisors (8256973).

18942339 is a wasteful number, since it uses less digits than its factorization.

18942339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485717.

The product of its digits is 46656, while the sum is 39.

The square root of 18942339 is about 4352.2797474427. The cubic root of 18942339 is about 266.5699567715.

The spelling of 18942339 in words is "eighteen million, nine hundred forty-two thousand, three hundred thirty-nine".