18222407 has 8 divisors (see below), whose sum is σ = 21218976. Its totient is φ = 15324192.

The previous prime is 18222367. The next prime is 18222427. The reversal of 18222407 is 70422281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18222407 - 2⁶ = 18222343 is a prime.

It is a super-2 number, since 2×18222407² = 664112233747298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18222427) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24188 + ... + 24929.

It is an arithmetic number, because the mean of its divisors is an integer number (2652372).

Almost surely, 2^18222407 is an apocalyptic number.

18222407 is a deficient number, since it is larger than the sum of its proper divisors (2996569).

18222407 is an equidigital number, since it uses as much as digits as its factorization.

18222407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49177.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 18222407 is about 4268.7711346475. The cubic root of 18222407 is about 263.1491152250.

Adding to 18222407 its reverse (70422281), we get a palindrome (88644688).

The spelling of 18222407 in words is "eighteen million, two hundred twenty-two thousand, four hundred seven".