18948679 has 2 divisors, whose sum is σ = 18948680. Its totient is φ = 18948678.

The previous prime is 18948653. The next prime is 18948691. The reversal of 18948679 is 97684981.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (97684981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18948679 - 2⁵ = 18948647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18948649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9474339 + 9474340.

It is an arithmetic number, because the mean of its divisors is an integer number (9474340).

Almost surely, 2^18948679 is an apocalyptic number.

18948679 is a deficient number, since it is larger than the sum of its proper divisors (1).

18948679 is an equidigital number, since it uses as much as digits as its factorization.

18948679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 52.

The square root of 18948679 is about 4353.0080404245. The cubic root of 18948679 is about 266.5996937716.

The spelling of 18948679 in words is "eighteen million, nine hundred forty-eight thousand, six hundred seventy-nine".