2090509920 has 72 divisors (see below), whose sum is σ = 7133870016. Its totient is φ = 557468928.

The previous prime is 2090509909. The next prime is 2090509933. The reversal of 2090509920 is 299050902.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 724432 + ... + 727311.

It is an arithmetic number, because the mean of its divisors is an integer number (99081528).

Almost surely, 2^2090509920 is an apocalyptic number.

2090509920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2090509920 is an abundant number, since it is smaller than the sum of its proper divisors (5043360096).

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

2090509920 is a wasteful number, since it uses less digits than its factorization.

2090509920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451764 (or 1451753 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 2090509920 is about 45722.0944402157. The cubic root of 2090509920 is about 1278.6472362043.

The spelling of 2090509920 in words is "two billion, ninety million, five hundred nine thousand, nine hundred twenty".