20580265820 has 24 divisors (see below), whose sum is σ = 43221266928. Its totient is φ = 8231590400.

The previous prime is 20580265751. The next prime is 20580265843. The reversal of 20580265820 is 2856208502.

It is a happy number.

It is a congruent number.

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, 561455 + ... + 596985.

It is an arithmetic number, because the mean of its divisors is an integer number (1800886122).

Almost surely, 2^20580265820 is an apocalyptic number.

20580265820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20580265820 is an abundant number, since it is smaller than the sum of its proper divisors (22641001108).

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

20580265820 is a wasteful number, since it uses less digits than its factorization.

20580265820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64501 (or 64499 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 38.

The spelling of 20580265820 in words is "twenty billion, five hundred eighty million, two hundred sixty-five thousand, eight hundred twenty".