1980165220 has 48 divisors (see below), whose sum is σ = 4733624448. Its totient is φ = 688751360.

The previous prime is 1980165203. The next prime is 1980165263. The reversal of 1980165220 is 225610891.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190609 + ... + 200728.

It is an arithmetic number, because the mean of its divisors is an integer number (98617176).

Almost surely, 2^1980165220 is an apocalyptic number.

1980165220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1980165220 is an abundant number, since it is smaller than the sum of its proper divisors (2753459228).

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

1980165220 is a wasteful number, since it uses less digits than its factorization.

1980165220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391380 (or 391378 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 1980165220 is about 44499.0474055344. The cubic root of 1980165220 is about 1255.7421619367.

The spelling of 1980165220 in words is "one billion, nine hundred eighty million, one hundred sixty-five thousand, two hundred twenty".