18614939 has 4 divisors (see below), whose sum is σ = 21274224. Its totient is φ = 15955656.

The previous prime is 18614923. The next prime is 18614941. The reversal of 18614939 is 93941681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93941681 = 19 ⋅4944299.

It is a cyclic number.

It is not a de Polignac number, because 18614939 - 2⁴ = 18614923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18614896 and 18614905.

It is not an unprimeable number, because it can be changed into a prime (18614909) 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 3 ways as a sum of consecutive naturals, for example, 1329632 + ... + 1329645.

It is an arithmetic number, because the mean of its divisors is an integer number (5318556).

Almost surely, 2^18614939 is an apocalyptic number.

18614939 is a deficient number, since it is larger than the sum of its proper divisors (2659285).

18614939 is an equidigital number, since it uses as much as digits as its factorization.

18614939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659284.

The product of its digits is 46656, while the sum is 41.

The square root of 18614939 is about 4314.5033317869. The cubic root of 18614939 is about 265.0252212853.

The spelling of 18614939 in words is "eighteen million, six hundred fourteen thousand, nine hundred thirty-nine".