185221126018 has 16 divisors (see below), whose sum is σ = 295114601880. Its totient is φ = 86884402176.

The previous prime is 185221125941. The next prime is 185221126043. The reversal of 185221126018 is 810621122581.

It can be written as a sum of positive squares in 4 ways, for example, as 122922463609 + 62298662409 = 350603^2 + 249597^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8691723 + ... + 8713006.

Almost surely, 2^185221126018 is an apocalyptic number.

185221126018 is a deficient number, since it is larger than the sum of its proper divisors (109893475862).

185221126018 is a wasteful number, since it uses less digits than its factorization.

185221126018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17405061.

The product of its (nonzero) digits is 15360, while the sum is 37.

Adding to 185221126018 its reverse (810621122581), we get a palindrome (995842248599).

The spelling of 185221126018 in words is "one hundred eighty-five billion, two hundred twenty-one million, one hundred twenty-six thousand, eighteen".