18244197 has 12 divisors (see below), whose sum is σ = 27329120. Its totient is φ = 12162636.

The previous prime is 18244183. The next prime is 18244211. The reversal of 18244197 is 79144281.

It is an interprime number because it is at equal distance from previous prime (18244183) and next prime (18244211).

It is not a de Polignac number, because 18244197 - 2¹¹ = 18242149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18244117) 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 11 ways as a sum of consecutive naturals, for example, 37297 + ... + 37782.

Almost surely, 2^18244197 is an apocalyptic number.

It is an amenable number.

18244197 is a deficient number, since it is larger than the sum of its proper divisors (9084923).

18244197 is an frugal number, since it uses more digits than its factorization.

18244197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75094 (or 75082 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 18244197 is about 4271.3226288821. The cubic root of 18244197 is about 263.2539629764.

The spelling of 18244197 in words is "eighteen million, two hundred forty-four thousand, one hundred ninety-seven".