33880018 has 4 divisors (see below), whose sum is σ = 50820030. Its totient is φ = 16940008.

The previous prime is 33880013. The next prime is 33880027. The reversal of 33880018 is 81008833.

33880018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81008833 = 349 ⋅232117.

It can be written as a sum of positive squares in only one way, i.e., 33674809 + 205209 = 5803^2 + 453^2 .

It is a super-2 number, since 2×33880018² = 2295711239360648, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) 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 (33880013) by changing a digit.

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 as a sum of consecutive naturals, namely, 8470003 + ... + 8470006.

Almost surely, 2^33880018 is an apocalyptic number.

33880018 is a deficient number, since it is larger than the sum of its proper divisors (16940012).

33880018 is a wasteful number, since it uses less digits than its factorization.

33880018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16940011.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 33880018 is about 5820.6544305602. The cubic root of 33880018 is about 323.5796573617.

The spelling of 33880018 in words is "thirty-three million, eight hundred eighty thousand, eighteen".