18264349 has 2 divisors, whose sum is σ = 18264350. Its totient is φ = 18264348.

The previous prime is 18264343. The next prime is 18264361. The reversal of 18264349 is 94346281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15960025 + 2304324 = 3995^2 + 1518^2 .

It is an emirp because it is prime and its reverse (94346281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18264349 - 2⁵ = 18264317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18264343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9132174 + 9132175.

It is an arithmetic number, because the mean of its divisors is an integer number (9132175).

Almost surely, 2^18264349 is an apocalyptic number.

It is an amenable number.

18264349 is a deficient number, since it is larger than the sum of its proper divisors (1).

18264349 is an equidigital number, since it uses as much as digits as its factorization.

18264349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 18264349 is about 4273.6809660994. The cubic root of 18264349 is about 263.3508548223.

The spelling of 18264349 in words is "eighteen million, two hundred sixty-four thousand, three hundred forty-nine".