18204079 has 2 divisors, whose sum is σ = 18204080. Its totient is φ = 18204078.

The previous prime is 18204077. The next prime is 18204089. The reversal of 18204079 is 97040281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18204079 - 2¹ = 18204077 is a prime.

Together with 18204077, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18204079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18204077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9102039 + 9102040.

It is an arithmetic number, because the mean of its divisors is an integer number (9102040).

Almost surely, 2^18204079 is an apocalyptic number.

18204079 is a deficient number, since it is larger than the sum of its proper divisors (1).

18204079 is an equidigital number, since it uses as much as digits as its factorization.

18204079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 18204079 is about 4266.6238409309. The cubic root of 18204079 is about 263.0608609699.

The spelling of 18204079 in words is "eighteen million, two hundred four thousand, seventy-nine".