18944037 has 72 divisors (see below), whose sum is σ = 34690656. Its totient is φ = 10287648.

The previous prime is 18944033. The next prime is 18944039. The reversal of 18944037 is 73044981.

It is a happy number.

18944037 is a `hidden beast` number, since 189 + 440 + 37 = 666.

It is not a de Polignac number, because 18944037 - 2² = 18944033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18943992 and 18944010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18944033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 440538 + ... + 440580.

Almost surely, 2^18944037 is an apocalyptic number.

It is an amenable number.

18944037 is a deficient number, since it is larger than the sum of its proper divisors (15746619).

18944037 is an equidigital number, since it uses as much as digits as its factorization.

18944037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 18944037 is about 4352.4748132528. The cubic root of 18944037 is about 266.5779216848.

The spelling of 18944037 in words is "eighteen million, nine hundred forty-four thousand, thirty-seven".