18339071 has 4 divisors (see below), whose sum is σ = 18729312. Its totient is φ = 17948832.

The previous prime is 18339059. The next prime is 18339077. The reversal of 18339071 is 17093381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17093381 = 17 ⋅1005493.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18339071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18339077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195050 + ... + 195143.

It is an arithmetic number, because the mean of its divisors is an integer number (4682328).

Almost surely, 2^18339071 is an apocalyptic number.

18339071 is a deficient number, since it is larger than the sum of its proper divisors (390241).

18339071 is an equidigital number, since it uses as much as digits as its factorization.

18339071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390240.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 18339071 is about 4282.4141555903. The cubic root of 18339071 is about 263.7095012052.

The spelling of 18339071 in words is "eighteen million, three hundred thirty-nine thousand, seventy-one".