18971059 has 2 divisors, whose sum is σ = 18971060. Its totient is φ = 18971058.

The previous prime is 18971053. The next prime is 18971083. The reversal of 18971059 is 95017981.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18971059 - 2⁹ = 18970547 is a prime.

It is not a weakly prime, because it can be changed into another prime (18971053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9485529 + 9485530.

It is an arithmetic number, because the mean of its divisors is an integer number (9485530).

Almost surely, 2^18971059 is an apocalyptic number.

18971059 is a deficient number, since it is larger than the sum of its proper divisors (1).

18971059 is an equidigital number, since it uses as much as digits as its factorization.

18971059 is an odious number, because the sum of its binary digits is odd.

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

The square root of 18971059 is about 4355.5779180265. The cubic root of 18971059 is about 266.7046114407.

The spelling of 18971059 in words is "eighteen million, nine hundred seventy-one thousand, fifty-nine".