2045851220 has 48 divisors (see below), whose sum is σ = 5168472960. Its totient is φ = 664516224.

The previous prime is 2045851217. The next prime is 2045851259. The reversal of 2045851220 is 221585402.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 381899 + ... + 387218.

It is an arithmetic number, because the mean of its divisors is an integer number (107676520).

Almost surely, 2^2045851220 is an apocalyptic number.

2045851220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2045851220 is an abundant number, since it is smaller than the sum of its proper divisors (3122621740).

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

2045851220 is a wasteful number, since it uses less digits than its factorization.

2045851220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769152 (or 769150 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 2045851220 is about 45231.0868761740. The cubic root of 2045851220 is about 1269.4765487008.

The spelling of 2045851220 in words is "two billion, forty-five million, eight hundred fifty-one thousand, two hundred twenty".