1980921412 has 12 divisors (see below), whose sum is σ = 3468575740. Its totient is φ = 989899776.

The previous prime is 1980921403. The next prime is 1980921469. The reversal of 1980921412 is 2141290891.

It can be written as a sum of positive squares in 2 ways, for example, as 445378816 + 1535542596 = 21104^2 + 39186^2 .

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, 132237 + ... + 146452.

Almost surely, 2^1980921412 is an apocalyptic number.

It is an amenable number.

1980921412 is a deficient number, since it is larger than the sum of its proper divisors (1487654328).

1980921412 is a wasteful number, since it uses less digits than its factorization.

1980921412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280470 (or 280468 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 1980921412 is about 44507.5433157122. The cubic root of 1980921412 is about 1255.9019905739.

The spelling of 1980921412 in words is "one billion, nine hundred eighty million, nine hundred twenty-one thousand, four hundred twelve".