18222469 has 8 divisors (see below), whose sum is σ = 19161720. Its totient is φ = 17304000.

The previous prime is 18222461. The next prime is 18222473. The reversal of 18222469 is 96422281.

It can be written as a sum of positive squares in 4 ways, for example, as 2722500 + 15499969 = 1650^2 + 3937^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18222469 - 2³ = 18222461 is a prime.

It is a super-2 number, since 2×18222469² = 664116752911922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18222461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3382 + ... + 6919.

It is an arithmetic number, because the mean of its divisors is an integer number (2395215).

Almost surely, 2^18222469 is an apocalyptic number.

It is an amenable number.

18222469 is a deficient number, since it is larger than the sum of its proper divisors (939251).

18222469 is a wasteful number, since it uses less digits than its factorization.

18222469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10391.

The product of its digits is 13824, while the sum is 34.

The square root of 18222469 is about 4268.7783966845. The cubic root of 18222469 is about 263.1494136712.

The spelling of 18222469 in words is "eighteen million, two hundred twenty-two thousand, four hundred sixty-nine".