2033221778 has 12 divisors (see below), whose sum is σ = 3547764702. Its totient is φ = 871380720.

The previous prime is 2033221741. The next prime is 2033221807. The reversal of 2033221778 is 8771223302.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1156884169 + 876337609 = 34013^2 + 29603^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10373483 + ... + 10373678.

Almost surely, 2^2033221778 is an apocalyptic number.

2033221778 is a deficient number, since it is larger than the sum of its proper divisors (1514542924).

2033221778 is a wasteful number, since it uses less digits than its factorization.

2033221778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20747177 (or 20747170 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 2033221778 is about 45091.2605501332. The cubic root of 2033221778 is about 1266.8589120798.

The spelling of 2033221778 in words is "two billion, thirty-three million, two hundred twenty-one thousand, seven hundred seventy-eight".