18904679 has 2 divisors, whose sum is σ = 18904680. Its totient is φ = 18904678.

The previous prime is 18904583. The next prime is 18904681. The reversal of 18904679 is 97640981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18904679 - 2⁸ = 18904423 is a prime.

Together with 18904681, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18904279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9452339 + 9452340.

It is an arithmetic number, because the mean of its divisors is an integer number (9452340).

Almost surely, 2^18904679 is an apocalyptic number.

18904679 is a deficient number, since it is larger than the sum of its proper divisors (1).

18904679 is an equidigital number, since it uses as much as digits as its factorization.

18904679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 18904679 is about 4347.9511266802. The cubic root of 18904679 is about 266.3931802055.

The spelling of 18904679 in words is "eighteen million, nine hundred four thousand, six hundred seventy-nine".