20320611272 has 64 divisors (see below), whose sum is σ = 41563368000. Its totient is φ = 9258073344.

The previous prime is 20320611217. The next prime is 20320611287. The reversal of 20320611272 is 27211602302.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2583698 + ... + 2591550.

It is an arithmetic number, because the mean of its divisors is an integer number (649427625).

Almost surely, 2^20320611272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20320611272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20781684000).

20320611272 is an abundant number, since it is smaller than the sum of its proper divisors (21242756728).

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

20320611272 is a wasteful number, since it uses less digits than its factorization.

20320611272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8190 (or 8186 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The spelling of 20320611272 in words is "twenty billion, three hundred twenty million, six hundred eleven thousand, two hundred seventy-two".