18222597 has 16 divisors (see below), whose sum is σ = 27072000. Its totient is φ = 12114432.

The previous prime is 18222587. The next prime is 18222613. The reversal of 18222597 is 79522281.

It is a de Polignac number, because none of the positive numbers 2^k-18222597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18222557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12229 + ... + 13637.

It is an arithmetic number, because the mean of its divisors is an integer number (1692000).

Almost surely, 2^18222597 is an apocalyptic number.

It is an amenable number.

18222597 is a deficient number, since it is larger than the sum of its proper divisors (8849403).

18222597 is a wasteful number, since it uses less digits than its factorization.

18222597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897 (or 1891 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 18222597 is about 4268.7933892378. The cubic root of 18222597 is about 263.1500298162.

The spelling of 18222597 in words is "eighteen million, two hundred twenty-two thousand, five hundred ninety-seven".