18748859 has 2 divisors, whose sum is σ = 18748860. Its totient is φ = 18748858.

The previous prime is 18748853. The next prime is 18748871. The reversal of 18748859 is 95884781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18748859 - 2²⁰ = 17700283 is a prime.

It is not a weakly prime, because it can be changed into another prime (18748853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9374429 + 9374430.

It is an arithmetic number, because the mean of its divisors is an integer number (9374430).

Almost surely, 2^18748859 is an apocalyptic number.

18748859 is a deficient number, since it is larger than the sum of its proper divisors (1).

18748859 is an equidigital number, since it uses as much as digits as its factorization.

18748859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 645120, while the sum is 50.

The square root of 18748859 is about 4329.9952655863. The cubic root of 18748859 is about 265.6592533267.

The spelling of 18748859 in words is "eighteen million, seven hundred forty-eight thousand, eight hundred fifty-nine".