18073937 has 4 divisors (see below), whose sum is σ = 20655936. Its totient is φ = 15491940.

The previous prime is 18073933. The next prime is 18073949. The reversal of 18073937 is 73937081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18073937 - 2² = 18073933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18073937.

It is not an unprimeable number, because it can be changed into a prime (18073933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1290989 + ... + 1291002.

It is an arithmetic number, because the mean of its divisors is an integer number (5163984).

Almost surely, 2^18073937 is an apocalyptic number.

It is an amenable number.

18073937 is a deficient number, since it is larger than the sum of its proper divisors (2581999).

18073937 is an equidigital number, since it uses as much as digits as its factorization.

18073937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581998.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 18073937 is about 4251.3453164851. The cubic root of 18073937 is about 262.4324821060.

The spelling of 18073937 in words is "eighteen million, seventy-three thousand, nine hundred thirty-seven".