20806192580 has 24 divisors (see below), whose sum is σ = 43715232792. Its totient is φ = 8318243072.

The previous prime is 20806192571. The next prime is 20806192597. The reversal of 20806192580 is 8529160802.

It can be written as a sum of positive squares in 4 ways, for example, as 5053504 + 20801139076 = 2248^2 + 144226^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224177 + ... + 303096.

It is an arithmetic number, because the mean of its divisors is an integer number (1821468033).

Almost surely, 2^20806192580 is an apocalyptic number.

20806192580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20806192580 is an abundant number, since it is smaller than the sum of its proper divisors (22909040212).

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

20806192580 is a wasteful number, since it uses less digits than its factorization.

20806192580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529255 (or 529253 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The spelling of 20806192580 in words is "twenty billion, eight hundred six million, one hundred ninety-two thousand, five hundred eighty".