18894373 has 4 divisors (see below), whose sum is σ = 19081548. Its totient is φ = 18707200.

The previous prime is 18894367. The next prime is 18894377. The reversal of 18894373 is 37349881.

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 12659364 + 6235009 = 3558^2 + 2497^2 .

It is a cyclic number.

It is not a de Polignac number, because 18894373 - 2¹³ = 18886181 is a prime.

It is a super-3 number, since 3×18894373³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18894377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93436 + ... + 93637.

It is an arithmetic number, because the mean of its divisors is an integer number (4770387).

Almost surely, 2^18894373 is an apocalyptic number.

It is an amenable number.

18894373 is a deficient number, since it is larger than the sum of its proper divisors (187175).

18894373 is a wasteful number, since it uses less digits than its factorization.

18894373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187174.

The product of its digits is 145152, while the sum is 43.

The square root of 18894373 is about 4346.7658091965. The cubic root of 18894373 is about 266.3447627887.

The spelling of 18894373 in words is "eighteen million, eight hundred ninety-four thousand, three hundred seventy-three".