18442297 has 16 divisors (see below), whose sum is σ = 20621952. Its totient is φ = 16403200.

The previous prime is 18442247. The next prime is 18442337. The reversal of 18442297 is 79224481.

It is a cyclic number.

It is not a de Polignac number, because 18442297 - 2¹⁵ = 18409529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18442247) 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 15 ways as a sum of consecutive naturals, for example, 39258 + ... + 39724.

It is an arithmetic number, because the mean of its divisors is an integer number (1288872).

Almost surely, 2^18442297 is an apocalyptic number.

18442297 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

18442297 is a deficient number, since it is larger than the sum of its proper divisors (2179655).

18442297 is a wasteful number, since it uses less digits than its factorization.

18442297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608.

The product of its digits is 32256, while the sum is 37.

The square root of 18442297 is about 4294.4495572774. The cubic root of 18442297 is about 264.2033604896.

The spelling of 18442297 in words is "eighteen million, four hundred forty-two thousand, two hundred ninety-seven".