18022646 has 8 divisors (see below), whose sum is σ = 27090504. Its totient is φ = 8992480.

The previous prime is 18022643. The next prime is 18022649. The reversal of 18022646 is 64622081.

It is an interprime number because it is at equal distance from previous prime (18022643) and next prime (18022649).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18022643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8195 + ... + 10158.

It is an arithmetic number, because the mean of its divisors is an integer number (3386313).

Almost surely, 2^18022646 is an apocalyptic number.

18022646 is a deficient number, since it is larger than the sum of its proper divisors (9067858).

18022646 is a wasteful number, since it uses less digits than its factorization.

18022646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18846.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 18022646 is about 4245.3087049118. The cubic root of 18022646 is about 262.1839994906.

The spelling of 18022646 in words is "eighteen million, twenty-two thousand, six hundred forty-six".