133220018 has 8 divisors (see below), whose sum is σ = 201663660. Its totient is φ = 65998800.

The previous prime is 133220011. The next prime is 133220027. The reversal of 133220018 is 810022331.

It can be written as a sum of positive squares in 2 ways, for example, as 133102369 + 117649 = 11537^2 + 343^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133220011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305333 + ... + 305768.

Almost surely, 2^133220018 is an apocalyptic number.

133220018 is a deficient number, since it is larger than the sum of its proper divisors (68443642).

133220018 is a wasteful number, since it uses less digits than its factorization.

133220018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611212.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 133220018 is about 11542.0976429763. The cubic root of 133220018 is about 510.7281895630.

Adding to 133220018 its reverse (810022331), we get a palindrome (943242349).

The spelling of 133220018 in words is "one hundred thirty-three million, two hundred twenty thousand, eighteen".