18531122 has 8 divisors (see below), whose sum is σ = 29431836. Its totient is φ = 8720512.

The previous prime is 18531119. The next prime is 18531127. The reversal of 18531122 is 22113581.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15437041 + 3094081 = 3929^2 + 1759^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18531127) 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 3 ways as a sum of consecutive naturals, for example, 272483 + ... + 272550.

Almost surely, 2^18531122 is an apocalyptic number.

18531122 is a deficient number, since it is larger than the sum of its proper divisors (10900714).

18531122 is a wasteful number, since it uses less digits than its factorization.

18531122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545052.

The product of its digits is 480, while the sum is 23.

The square root of 18531122 is about 4304.7789722586. The cubic root of 18531122 is about 264.6268487228.

The spelling of 18531122 in words is "eighteen million, five hundred thirty-one thousand, one hundred twenty-two".