2169985220 has 24 divisors (see below), whose sum is σ = 4907505624. Its totient is φ = 801225216.

The previous prime is 2169985177. The next prime is 2169985241. The reversal of 2169985220 is 225899612.

It can be written as a sum of positive squares in 4 ways, for example, as 1406596 + 2168578624 = 1186^2 + 46568^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4172789 + ... + 4173308.

It is an arithmetic number, because the mean of its divisors is an integer number (204479401).

Almost surely, 2^2169985220 is an apocalyptic number.

2169985220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2169985220 is an abundant number, since it is smaller than the sum of its proper divisors (2737520404).

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

2169985220 is a wasteful number, since it uses less digits than its factorization.

2169985220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8346119 (or 8346117 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 2169985220 is about 46583.1001544552. The cubic root of 2169985220 is about 1294.6496510549.

The spelling of 2169985220 in words is "two billion, one hundred sixty-nine million, nine hundred eighty-five thousand, two hundred twenty".