18859459 has 2 divisors, whose sum is σ = 18859460. Its totient is φ = 18859458.

The previous prime is 18859453. The next prime is 18859469. The reversal of 18859459 is 95495881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18859459 - 2⁹ = 18858947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18859453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9429729 + 9429730.

It is an arithmetic number, because the mean of its divisors is an integer number (9429730).

Almost surely, 2^18859459 is an apocalyptic number.

18859459 is a deficient number, since it is larger than the sum of its proper divisors (1).

18859459 is an equidigital number, since it uses as much as digits as its factorization.

18859459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 49.

The square root of 18859459 is about 4342.7478628168. The cubic root of 18859459 is about 266.1806064240.

The spelling of 18859459 in words is "eighteen million, eight hundred fifty-nine thousand, four hundred fifty-nine".