2090685220 has 24 divisors (see below), whose sum is σ = 4728165624. Its totient is φ = 771945216.

The previous prime is 2090685217. The next prime is 2090685221. The reversal of 2090685220 is 225860902.

It can be written as a sum of positive squares in 4 ways, for example, as 22982436 + 2067702784 = 4794^2 + 45472^2 .

It is not an unprimeable number, because it can be changed into a prime (2090685221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4020289 + ... + 4020808.

It is an arithmetic number, because the mean of its divisors is an integer number (197006901).

Almost surely, 2^2090685220 is an apocalyptic number.

2090685220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2090685220 is an abundant number, since it is smaller than the sum of its proper divisors (2637480404).

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

2090685220 is a wasteful number, since it uses less digits than its factorization.

2090685220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8041119 (or 8041117 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 2090685220 is about 45724.0114163226. The cubic root of 2090685220 is about 1278.6829755859.

The spelling of 2090685220 in words is "two billion, ninety million, six hundred eighty-five thousand, two hundred twenty".