18022522 has 8 divisors (see below), whose sum is σ = 30895776. Its totient is φ = 7723932.

The previous prime is 18022517. The next prime is 18022523. The reversal of 18022522 is 22522081.

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

It is a super-2 number, since 2×18022522² = 649622598480968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18022493 and 18022502.

It is not an unprimeable number, because it can be changed into a prime (18022523) 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, 643648 + ... + 643675.

It is an arithmetic number, because the mean of its divisors is an integer number (3861972).

Almost surely, 2^18022522 is an apocalyptic number.

18022522 is a deficient number, since it is larger than the sum of its proper divisors (12873254).

18022522 is a wasteful number, since it uses less digits than its factorization.

18022522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287332.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 18022522 is about 4245.2941005306. The cubic root of 18022522 is about 262.1833981936.

The spelling of 18022522 in words is "eighteen million, twenty-two thousand, five hundred twenty-two".