1980221804 has 12 divisors (see below), whose sum is σ = 3780423528. Its totient is φ = 900100800.

The previous prime is 1980221797. The next prime is 1980221827. The reversal of 1980221804 is 4081220891.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22502477 + ... + 22502564.

It is an arithmetic number, because the mean of its divisors is an integer number (315035294).

Almost surely, 2^1980221804 is an apocalyptic number.

It is an amenable number.

1980221804 is a deficient number, since it is larger than the sum of its proper divisors (1800201724).

1980221804 is a wasteful number, since it uses less digits than its factorization.

1980221804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45005056 (or 45005054 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 1980221804 is about 44499.6831898835. The cubic root of 1980221804 is about 1255.7541229315.

The spelling of 1980221804 in words is "one billion, nine hundred eighty million, two hundred twenty-one thousand, eight hundred four".