22018369 has 2 divisors, whose sum is σ = 22018370. Its totient is φ = 22018368.

The previous prime is 22018363. The next prime is 22018379. The reversal of 22018369 is 96381022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16200625 + 5817744 = 4025^2 + 2412^2 .

It is a cyclic number.

It is not a de Polignac number, because 22018369 - 2³ = 22018361 is a prime.

It is a super-2 number, since 2×22018369² = 969617146840322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22018369.

It is not a weakly prime, because it can be changed into another prime (22018361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11009184 + 11009185.

It is an arithmetic number, because the mean of its divisors is an integer number (11009185).

Almost surely, 2^22018369 is an apocalyptic number.

It is an amenable number.

22018369 is a deficient number, since it is larger than the sum of its proper divisors (1).

22018369 is an equidigital number, since it uses as much as digits as its factorization.

22018369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 22018369 is about 4692.3734932335. The cubic root of 22018369 is about 280.2818972199.

The spelling of 22018369 in words is "twenty-two million, eighteen thousand, three hundred sixty-nine".