2109291020 has 24 divisors (see below), whose sum is σ = 4434889200. Its totient is φ = 842692032.

The previous prime is 2109290999. The next prime is 2109291049. The reversal of 2109291020 is 201929012.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47030 + ... + 80189.

It is an arithmetic number, because the mean of its divisors is an integer number (184787050).

Almost surely, 2^2109291020 is an apocalyptic number.

2109291020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2109291020 is an abundant number, since it is smaller than the sum of its proper divisors (2325598180).

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

2109291020 is a wasteful number, since it uses less digits than its factorization.

2109291020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128057 (or 128055 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 2109291020 is about 45927.0184096464. The cubic root of 2109291020 is about 1282.4649400744.

The spelling of 2109291020 in words is "two billion, one hundred nine million, two hundred ninety-one thousand, twenty".