18733073 has 4 divisors (see below), whose sum is σ = 18781620. Its totient is φ = 18684528.

The previous prime is 18733061. The next prime is 18733087. The reversal of 18733073 is 37033781.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12837889 + 5895184 = 3583^2 + 2428^2 .

It is a cyclic number.

It is not a de Polignac number, because 18733073 - 2¹² = 18728977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18733093) 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, 23690 + ... + 24467.

It is an arithmetic number, because the mean of its divisors is an integer number (4695405).

Almost surely, 2^18733073 is an apocalyptic number.

It is an amenable number.

18733073 is a deficient number, since it is larger than the sum of its proper divisors (48547).

18733073 is an equidigital number, since it uses as much as digits as its factorization.

18733073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48546.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 18733073 is about 4328.1720159901. The cubic root of 18733073 is about 265.5846732413.

The spelling of 18733073 in words is "eighteen million, seven hundred thirty-three thousand, seventy-three".