18768479 has 2 divisors, whose sum is σ = 18768480. Its totient is φ = 18768478.

The previous prime is 18768461. The next prime is 18768499. The reversal of 18768479 is 97486781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18768479 - 2⁸ = 18768223 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18768499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9384239 + 9384240.

It is an arithmetic number, because the mean of its divisors is an integer number (9384240).

Almost surely, 2^18768479 is an apocalyptic number.

18768479 is a deficient number, since it is larger than the sum of its proper divisors (1).

18768479 is an equidigital number, since it uses as much as digits as its factorization.

18768479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 50.

The square root of 18768479 is about 4332.2602645732. The cubic root of 18768479 is about 265.7518886077.

The spelling of 18768479 in words is "eighteen million, seven hundred sixty-eight thousand, four hundred seventy-nine".