18836445 has 16 divisors (see below), whose sum is σ = 30214080. Its totient is φ = 10020864.

The previous prime is 18836423. The next prime is 18836449. The reversal of 18836445 is 54463881.

It is not a de Polignac number, because 18836445 - 2⁷ = 18836317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18836449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5661 + ... + 8349.

It is an arithmetic number, because the mean of its divisors is an integer number (1888380).

Almost surely, 2^18836445 is an apocalyptic number.

18836445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18836445 is a deficient number, since it is larger than the sum of its proper divisors (11377635).

18836445 is a wasteful number, since it uses less digits than its factorization.

18836445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3164.

The product of its digits is 92160, while the sum is 39.

The square root of 18836445 is about 4340.0973491386. The cubic root of 18836445 is about 266.0722898855.

The spelling of 18836445 in words is "eighteen million, eight hundred thirty-six thousand, four hundred forty-five".