18043022 has 4 divisors (see below), whose sum is σ = 27064536. Its totient is φ = 9021510.

The previous prime is 18043019. The next prime is 18043057. The reversal of 18043022 is 22034081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22034081 = 59 ⋅373459.

It is a junction number, because it is equal to n+sod(n) for n = 18042985 and 18043003.

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, 4510754 + ... + 4510757.

It is an arithmetic number, because the mean of its divisors is an integer number (6766134).

Almost surely, 2^18043022 is an apocalyptic number.

18043022 is a deficient number, since it is larger than the sum of its proper divisors (9021514).

18043022 is an equidigital number, since it uses as much as digits as its factorization.

18043022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9021513.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 18043022 is about 4247.7078524776. The cubic root of 18043022 is about 262.2827687308.

The spelling of 18043022 in words is "eighteen million, forty-three thousand, twenty-two".