20711530700 has 216 divisors, whose sum is σ = 54484950240. Its totient is φ = 6807628800.

The previous prime is 20711530699. The next prime is 20711530753. The reversal of 20711530700 is 703511702.

It is a self number, because there is not a number n which added to its sum of digits gives 20711530700.

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 71 ways as a sum of consecutive naturals, for example, 12871496 + ... + 12873104.

It is an arithmetic number, because the mean of its divisors is an integer number (252245140).

Almost surely, 2^20711530700 is an apocalyptic number.

20711530700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20711530700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27242475120).

20711530700 is an abundant number, since it is smaller than the sum of its proper divisors (33773419540).

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

20711530700 is a wasteful number, since it uses less digits than its factorization.

20711530700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745 (or 1731 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 26.

The spelling of 20711530700 in words is "twenty billion, seven hundred eleven million, five hundred thirty thousand, seven hundred".