18719059 has 2 divisors, whose sum is σ = 18719060. Its totient is φ = 18719058.

The previous prime is 18719053. The next prime is 18719087. The reversal of 18719059 is 95091781.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18719059 - 2⁵ = 18719027 is a prime.

It is not a weakly prime, because it can be changed into another prime (18719053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9359529 + 9359530.

It is an arithmetic number, because the mean of its divisors is an integer number (9359530).

Almost surely, 2^18719059 is an apocalyptic number.

18719059 is a deficient number, since it is larger than the sum of its proper divisors (1).

18719059 is an equidigital number, since it uses as much as digits as its factorization.

18719059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 18719059 is about 4326.5527848392. The cubic root of 18719059 is about 265.5184297566.

The spelling of 18719059 in words is "eighteen million, seven hundred nineteen thousand, fifty-nine".