20711312272 has 40 divisors (see below), whose sum is σ = 45978753600. Its totient is φ = 8853439872.

The previous prime is 20711312263. The next prime is 20711312299. The reversal of 20711312272 is 27221311702.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 20711312272.

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, 194122 + ... + 281257.

It is an arithmetic number, because the mean of its divisors is an integer number (1149468840).

Almost surely, 2^20711312272 is an apocalyptic number.

It is an amenable number.

20711312272 is an abundant number, since it is smaller than the sum of its proper divisors (25267441328).

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

20711312272 is a wasteful number, since it uses less digits than its factorization.

20711312272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475783 (or 475777 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

Adding to 20711312272 its reverse (27221311702), we get a palindrome (47932623974).

The spelling of 20711312272 in words is "twenty billion, seven hundred eleven million, three hundred twelve thousand, two hundred seventy-two".