18842445 has 12 divisors (see below), whose sum is σ = 32660316. Its totient is φ = 10049280.

The previous prime is 18842437. The next prime is 18842491. The reversal of 18842445 is 54424881.

It can be written as a sum of positive squares in 2 ways, for example, as 4485924 + 14356521 = 2118^2 + 3789^2 .

It is not a de Polignac number, because 18842445 - 2³ = 18842437 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 11 ways as a sum of consecutive naturals, for example, 209316 + ... + 209405.

It is an arithmetic number, because the mean of its divisors is an integer number (2721693).

Almost surely, 2^18842445 is an apocalyptic number.

18842445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18842445 is a deficient number, since it is larger than the sum of its proper divisors (13817871).

18842445 is a wasteful number, since it uses less digits than its factorization.

18842445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418732 (or 418729 counting only the distinct ones).

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

The square root of 18842445 is about 4340.7885228378. The cubic root of 18842445 is about 266.1005376832.

The spelling of 18842445 in words is "eighteen million, eight hundred forty-two thousand, four hundred forty-five".