18141845 has 8 divisors (see below), whose sum is σ = 21821400. Its totient is φ = 14479360.

The previous prime is 18141841. The next prime is 18141857. The reversal of 18141845 is 54814181.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1552516 + 16589329 = 1246^2 + 4073^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18141845 - 2² = 18141841 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18141841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1796 + ... + 6285.

It is an arithmetic number, because the mean of its divisors is an integer number (2727675).

Almost surely, 2^18141845 is an apocalyptic number.

It is an amenable number.

18141845 is a deficient number, since it is larger than the sum of its proper divisors (3679555).

18141845 is an equidigital number, since it uses as much as digits as its factorization.

18141845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8535.

The product of its digits is 5120, while the sum is 32.

The square root of 18141845 is about 4259.3244769564. The cubic root of 18141845 is about 262.7607446924.

The spelling of 18141845 in words is "eighteen million, one hundred forty-one thousand, eight hundred forty-five".