18899459 has 2 divisors, whose sum is σ = 18899460. Its totient is φ = 18899458.

The previous prime is 18899449. The next prime is 18899467. The reversal of 18899459 is 95499881.

It is a strong prime.

It is an emirp because it is prime and its reverse (95499881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18899459 - 2¹⁶ = 18833923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18899459.

It is not a weakly prime, because it can be changed into another prime (18899449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9449729 + 9449730.

It is an arithmetic number, because the mean of its divisors is an integer number (9449730).

Almost surely, 2^18899459 is an apocalyptic number.

18899459 is a deficient number, since it is larger than the sum of its proper divisors (1).

18899459 is an equidigital number, since it uses as much as digits as its factorization.

18899459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 53.

The square root of 18899459 is about 4347.3508025003. The cubic root of 18899459 is about 266.3686589320.

The spelling of 18899459 in words is "eighteen million, eight hundred ninety-nine thousand, four hundred fifty-nine".