18842093 has 4 divisors (see below), whose sum is σ = 18968700. Its totient is φ = 18715488.

The previous prime is 18842071. The next prime is 18842111. The reversal of 18842093 is 39024881.

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 3452164 + 15389929 = 1858^2 + 3923^2 .

It is a cyclic number.

It is not a de Polignac number, because 18842093 - 2⁶ = 18842029 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 (18842003) 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, 63080 + ... + 63377.

It is an arithmetic number, because the mean of its divisors is an integer number (4742175).

Almost surely, 2^18842093 is an apocalyptic number.

It is an amenable number.

18842093 is a deficient number, since it is larger than the sum of its proper divisors (126607).

18842093 is a wasteful number, since it uses less digits than its factorization.

18842093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126606.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 18842093 is about 4340.7479770196. The cubic root of 18842093 is about 266.0988806447.

The spelling of 18842093 in words is "eighteen million, eight hundred forty-two thousand, ninety-three".