20710691580 has 24 divisors (see below), whose sum is σ = 57989936592. Its totient is φ = 5522851072.

The previous prime is 20710691569. The next prime is 20710691621. The reversal of 20710691580 is 8519601702.

It is a congruent number.

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, 172589037 + ... + 172589156.

It is an arithmetic number, because the mean of its divisors is an integer number (2416247358).

Almost surely, 2^20710691580 is an apocalyptic number.

20710691580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20710691580 is an abundant number, since it is smaller than the sum of its proper divisors (37279245012).

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

20710691580 is a wasteful number, since it uses less digits than its factorization.

20710691580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345178205 (or 345178203 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 39.

The spelling of 20710691580 in words is "twenty billion, seven hundred ten million, six hundred ninety-one thousand, five hundred eighty".