2169805180 has 12 divisors (see below), whose sum is σ = 4556590920. Its totient is φ = 867922064.

The previous prime is 2169805163. The next prime is 2169805189. The reversal of 2169805180 is 815089612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2169805189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54245110 + ... + 54245149.

It is an arithmetic number, because the mean of its divisors is an integer number (379715910).

Almost surely, 2^2169805180 is an apocalyptic number.

2169805180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2169805180 is an abundant number, since it is smaller than the sum of its proper divisors (2386785740).

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

2169805180 is a wasteful number, since it uses less digits than its factorization.

2169805180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108490268 (or 108490266 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 2169805180 is about 46581.1676538921. The cubic root of 2169805180 is about 1294.6138451014.

The spelling of 2169805180 in words is "two billion, one hundred sixty-nine million, eight hundred five thousand, one hundred eighty".