18222433 has 2 divisors, whose sum is σ = 18222434. Its totient is φ = 18222432.

The previous prime is 18222431. The next prime is 18222437. The reversal of 18222433 is 33422281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13417569 + 4804864 = 3663^2 + 2192^2 .

It is an emirp because it is prime and its reverse (33422281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18222433 - 2¹ = 18222431 is a prime.

Together with 18222431, it forms a pair of twin primes.

It is equal to p_1164562 and since 18222433 and 1164562 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 18222398 and 18222407.

It is not a weakly prime, because it can be changed into another prime (18222431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9111216 + 9111217.

It is an arithmetic number, because the mean of its divisors is an integer number (9111217).

Almost surely, 2^18222433 is an apocalyptic number.

It is an amenable number.

18222433 is a deficient number, since it is larger than the sum of its proper divisors (1).

18222433 is an equidigital number, since it uses as much as digits as its factorization.

18222433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 25.

The square root of 18222433 is about 4268.7741800194. The cubic root of 18222433 is about 263.1492403800.

The spelling of 18222433 in words is "eighteen million, two hundred twenty-two thousand, four hundred thirty-three".