18641373 has 4 divisors (see below), whose sum is σ = 24855168. Its totient is φ = 12427580.

The previous prime is 18641369. The next prime is 18641387. The reversal of 18641373 is 37314681.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37314681 = 3 ⋅12438227.

It is a cyclic number.

It is not a de Polignac number, because 18641373 - 2² = 18641369 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18641473) 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, 3106893 + ... + 3106898.

It is an arithmetic number, because the mean of its divisors is an integer number (6213792).

Almost surely, 2^18641373 is an apocalyptic number.

It is an amenable number.

18641373 is a deficient number, since it is larger than the sum of its proper divisors (6213795).

18641373 is an equidigital number, since it uses as much as digits as its factorization.

18641373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6213794.

The product of its digits is 12096, while the sum is 33.

The square root of 18641373 is about 4317.5656335486. The cubic root of 18641373 is about 265.1506109556.

The spelling of 18641373 in words is "eighteen million, six hundred forty-one thousand, three hundred seventy-three".