18844245 has 120 divisors (see below), whose sum is σ = 42793344. Its totient is φ = 7755264.

The previous prime is 18844207. The next prime is 18844283. The reversal of 18844245 is 54244881.

It is an interprime number because it is at equal distance from previous prime (18844207) and next prime (18844283).

It is not a de Polignac number, because 18844245 - 2⁹ = 18843733 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 819304 + ... + 819326.

Almost surely, 2^18844245 is an apocalyptic number.

18844245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18844245 is an abundant number, since it is smaller than the sum of its proper divisors (23949099).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18844245 is a wasteful number, since it uses less digits than its factorization.

18844245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 55 counting only the distinct ones).

The product of its digits is 40960, while the sum is 36.

The square root of 18844245 is about 4340.9958534880. The cubic root of 18844245 is about 266.1090108532.

Adding to 18844245 its sum of digits (36), we get a square (18844281 = 4341²).

The spelling of 18844245 in words is "eighteen million, eight hundred forty-four thousand, two hundred forty-five".