18845445 has 16 divisors (see below), whose sum is σ = 30889152. Its totient is φ = 9805440.

The previous prime is 18845419. The next prime is 18845479. The reversal of 18845445 is 54454881.

It is not a de Polignac number, because 18845445 - 2⁶ = 18845381 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 15 ways as a sum of consecutive naturals, for example, 14707 + ... + 15936.

It is an arithmetic number, because the mean of its divisors is an integer number (1930572).

Almost surely, 2^18845445 is an apocalyptic number.

18845445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18845445 is a deficient number, since it is larger than the sum of its proper divisors (12043707).

18845445 is a wasteful number, since it uses less digits than its factorization.

18845445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30692.

The product of its digits is 102400, while the sum is 39.

The square root of 18845445 is about 4341.1340684204. The cubic root of 18845445 is about 266.1146593334.

The spelling of 18845445 in words is "eighteen million, eight hundred forty-five thousand, four hundred forty-five".