18133227690 has 16 divisors (see below), whose sum is σ = 43519746528. Its totient is φ = 4835527376.

The previous prime is 18133227643. The next prime is 18133227691. The reversal of 18133227690 is 9672233181.

It is a super-2 number, since 2×18133227690² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18133227691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302220432 + ... + 302220491.

It is an arithmetic number, because the mean of its divisors is an integer number (2719984158).

Almost surely, 2^18133227690 is an apocalyptic number.

18133227690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18133227690 is an abundant number, since it is smaller than the sum of its proper divisors (25386518838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18133227690 is a wasteful number, since it uses less digits than its factorization.

18133227690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604440933.

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 18133227690 in words is "eighteen billion, one hundred thirty-three million, two hundred twenty-seven thousand, six hundred ninety".