18423853 has 6 divisors (see below), whose sum is σ = 21431886. Its totient is φ = 15791832.

The previous prime is 18423841. The next prime is 18423893. The reversal of 18423853 is 35832481.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11009124 + 7414729 = 3318^2 + 2723^2 .

It is not a de Polignac number, because 18423853 - 2⁹ = 18423341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18423803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 187950 + ... + 188047.

It is an arithmetic number, because the mean of its divisors is an integer number (3571981).

Almost surely, 2^18423853 is an apocalyptic number.

It is an amenable number.

18423853 is a deficient number, since it is larger than the sum of its proper divisors (3008033).

18423853 is an equidigital number, since it uses as much as digits as its factorization.

18423853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376011 (or 376004 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 18423853 is about 4292.3015970456. The cubic root of 18423853 is about 264.1152551927.

The spelling of 18423853 in words is "eighteen million, four hundred twenty-three thousand, eight hundred fifty-three".