18222373 has 4 divisors (see below), whose sum is σ = 19624108. Its totient is φ = 16820640.

The previous prime is 18222367. The next prime is 18222427. The reversal of 18222373 is 37322281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37322281 = 3491 ⋅10691.

It can be written as a sum of positive squares in 2 ways, for example, as 1844164 + 16378209 = 1358^2 + 4047^2 .

It is a cyclic number.

It is not a de Polignac number, because 18222373 - 2¹⁷ = 18091301 is a prime.

It is a super-2 number, since 2×18222373² = 664109755502258, 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 (18222343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700848 + ... + 700873.

It is an arithmetic number, because the mean of its divisors is an integer number (4906027).

Almost surely, 2^18222373 is an apocalyptic number.

18222373 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18222373 is a deficient number, since it is larger than the sum of its proper divisors (1401735).

18222373 is a wasteful number, since it uses less digits than its factorization.

18222373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401734.

The product of its digits is 4032, while the sum is 28.

The square root of 18222373 is about 4268.7671522349. The cubic root of 18222373 is about 263.1489515606.

The spelling of 18222373 in words is "eighteen million, two hundred twenty-two thousand, three hundred seventy-three".