18222485 has 4 divisors (see below), whose sum is σ = 21866988. Its totient is φ = 14577984.

The previous prime is 18222473. The next prime is 18222541. The reversal of 18222485 is 58422281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12264004 + 5958481 = 3502^2 + 2441^2 .

It is a cyclic number.

It is not a de Polignac number, because 18222485 - 2¹⁶ = 18156949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1822244 + ... + 1822253.

It is an arithmetic number, because the mean of its divisors is an integer number (5466747).

Almost surely, 2^18222485 is an apocalyptic number.

It is an amenable number.

18222485 is a deficient number, since it is larger than the sum of its proper divisors (3644503).

18222485 is an equidigital number, since it uses as much as digits as its factorization.

18222485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3644502.

The product of its digits is 10240, while the sum is 32.

The square root of 18222485 is about 4268.7802707565. The cubic root of 18222485 is about 263.1494906895.

The spelling of 18222485 in words is "eighteen million, two hundred twenty-two thousand, four hundred eighty-five".