20317920580 has 24 divisors (see below), whose sum is σ = 42846168960. Its totient is φ = 8093161440.

The previous prime is 20317920563. The next prime is 20317920611. The reversal of 20317920580 is 8502971302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2120526 + ... + 2130085.

It is an arithmetic number, because the mean of its divisors is an integer number (1785257040).

Almost surely, 2^20317920580 is an apocalyptic number.

20317920580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20317920580 is an abundant number, since it is smaller than the sum of its proper divisors (22528248380).

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

20317920580 is a wasteful number, since it uses less digits than its factorization.

20317920580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250859 (or 4250857 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 20317920580 in words is "twenty billion, three hundred seventeen million, nine hundred twenty thousand, five hundred eighty".