18022697 has 32 divisors (see below), whose sum is σ = 24084480. Its totient is φ = 13063680.

The previous prime is 18022691. The next prime is 18022727. The reversal of 18022697 is 79622081.

It is a happy number.

It is not a de Polignac number, because 18022697 - 2⁴ = 18022681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18022691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141848 + ... + 141974.

It is an arithmetic number, because the mean of its divisors is an integer number (752640).

Almost surely, 2^18022697 is an apocalyptic number.

It is an amenable number.

18022697 is a deficient number, since it is larger than the sum of its proper divisors (6061783).

18022697 is a wasteful number, since it uses less digits than its factorization.

18022697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 18022697 is about 4245.3147115379. The cubic root of 18022697 is about 262.1842467975.

The spelling of 18022697 in words is "eighteen million, twenty-two thousand, six hundred ninety-seven".