18285422 has 4 divisors (see below), whose sum is σ = 27428136. Its totient is φ = 9142710.

The previous prime is 18285413. The next prime is 18285431. The reversal of 18285422 is 22458281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22458281 = 23 ⋅976447.

It is an interprime number because it is at equal distance from previous prime (18285413) and next prime (18285431).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4571354 + ... + 4571357.

It is an arithmetic number, because the mean of its divisors is an integer number (6857034).

Almost surely, 2^18285422 is an apocalyptic number.

18285422 is a deficient number, since it is larger than the sum of its proper divisors (9142714).

18285422 is an equidigital number, since it uses as much as digits as its factorization.

18285422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9142713.

The product of its digits is 10240, while the sum is 32.

The square root of 18285422 is about 4276.1456944309. The cubic root of 18285422 is about 263.4520986827.

The spelling of 18285422 in words is "eighteen million, two hundred eighty-five thousand, four hundred twenty-two".