18222416 has 10 divisors (see below), whose sum is σ = 35305962. Its totient is φ = 9111200.

The previous prime is 18222367. The next prime is 18222427. The reversal of 18222416 is 61422281.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16032016 + 2190400 = 4004^2 + 1480^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569435 + ... + 569466.

Almost surely, 2^18222416 is an apocalyptic number.

18222416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18222416 is a deficient number, since it is larger than the sum of its proper divisors (17083546).

18222416 is a wasteful number, since it uses less digits than its factorization.

18222416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138909 (or 1138903 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 18222416 is about 4268.7721888150. The cubic root of 18222416 is about 263.1491585479.

Adding to 18222416 its reverse (61422281), we get a palindrome (79644697).

The spelling of 18222416 in words is "eighteen million, two hundred twenty-two thousand, four hundred sixteen".