18022859 has 2 divisors, whose sum is σ = 18022860. Its totient is φ = 18022858.

The previous prime is 18022847. The next prime is 18022867. The reversal of 18022859 is 95822081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18022859 - 2⁴ = 18022843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18022819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9011429 + 9011430.

It is an arithmetic number, because the mean of its divisors is an integer number (9011430).

Almost surely, 2^18022859 is an apocalyptic number.

18022859 is a deficient number, since it is larger than the sum of its proper divisors (1).

18022859 is an equidigital number, since it uses as much as digits as its factorization.

18022859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 18022859 is about 4245.3337913526. Note that the first 3 decimals coincide. The cubic root of 18022859 is about 262.1850323573.

It can be divided in two parts, 18022 and 859, that added together give a palindrome (18881).

The spelling of 18022859 in words is "eighteen million, twenty-two thousand, eight hundred fifty-nine".