18545944 has 16 divisors (see below), whose sum is σ = 34831800. Its totient is φ = 9257472.

The previous prime is 18545941. The next prime is 18545953. The reversal of 18545944 is 44954581.

It is a super-2 number, since 2×18545944² = 687904077702272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18545897 and 18545906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18545941) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4344 + ... + 7480.

Almost surely, 2^18545944 is an apocalyptic number.

It is an amenable number.

18545944 is a deficient number, since it is larger than the sum of its proper divisors (16285856).

18545944 is a wasteful number, since it uses less digits than its factorization.

18545944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3882 (or 3878 counting only the distinct ones).

The product of its digits is 115200, while the sum is 40.

The square root of 18545944 is about 4306.5002031812. The cubic root of 18545944 is about 264.6973832875.

The spelling of 18545944 in words is "eighteen million, five hundred forty-five thousand, nine hundred forty-four".