20985348260 has 24 divisors (see below), whose sum is σ = 44228337720. Its totient is φ = 8363833344.

The previous prime is 20985348259. The next prime is 20985348287. The reversal of 20985348260 is 6284358902.

It can be written as a sum of positive squares in 4 ways, for example, as 722964544 + 20262383716 = 26888^2 + 142346^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1888445 + ... + 1899524.

It is an arithmetic number, because the mean of its divisors is an integer number (1842847405).

Almost surely, 2^20985348260 is an apocalyptic number.

20985348260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20985348260 is an abundant number, since it is smaller than the sum of its proper divisors (23242989460).

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

20985348260 is a wasteful number, since it uses less digits than its factorization.

20985348260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3788255 (or 3788253 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 20985348260 in words is "twenty billion, nine hundred eighty-five million, three hundred forty-eight thousand, two hundred sixty".