18873373 has 4 divisors (see below), whose sum is σ = 19040508. Its totient is φ = 18706240.

The previous prime is 18873331. The next prime is 18873419. The reversal of 18873373 is 37337881.

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 1750329 + 17123044 = 1323^2 + 4138^2 .

It is a cyclic number.

It is not a de Polignac number, because 18873373 - 2¹³ = 18865181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18873313) 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, 83398 + ... + 83623.

It is an arithmetic number, because the mean of its divisors is an integer number (4760127).

Almost surely, 2^18873373 is an apocalyptic number.

It is an amenable number.

18873373 is a deficient number, since it is larger than the sum of its proper divisors (167135).

18873373 is a wasteful number, since it uses less digits than its factorization.

18873373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167134.

The product of its digits is 84672, while the sum is 40.

The square root of 18873373 is about 4344.3495485515. The cubic root of 18873373 is about 266.2460506221.

The spelling of 18873373 in words is "eighteen million, eight hundred seventy-three thousand, three hundred seventy-three".