33138190818 has 24 divisors (see below), whose sum is σ = 71896076928. Its totient is φ = 11031192312.

The previous prime is 33138190817. The next prime is 33138190867. The reversal of 33138190818 is 81809183133.

It is not an unprimeable number, because it can be changed into a prime (33138190817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1225530 + ... + 1252277.

It is an arithmetic number, because the mean of its divisors is an integer number (2995669872).

Almost surely, 2^33138190818 is an apocalyptic number.

33138190818 is an abundant number, since it is smaller than the sum of its proper divisors (38757886110).

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

33138190818 is a wasteful number, since it uses less digits than its factorization.

33138190818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2478558 (or 2478555 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 33138190818 in words is "thirty-three billion, one hundred thirty-eight million, one hundred ninety thousand, eight hundred eighteen".