20775730272 has 96 divisors (see below), whose sum is σ = 62625467520. Its totient is φ = 5964318720.

The previous prime is 20775730271. The next prime is 20775730279. The reversal of 20775730272 is 27203757702.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20775730271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 497673 + ... + 537800.

It is an arithmetic number, because the mean of its divisors is an integer number (652348620).

Almost surely, 2^20775730272 is an apocalyptic number.

20775730272 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20775730272 is an abundant number, since it is smaller than the sum of its proper divisors (41849737248).

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

20775730272 is a wasteful number, since it uses less digits than its factorization.

20775730272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035516 (or 1035508 counting only the distinct ones).

The product of its (nonzero) digits is 288120, while the sum is 42.

The spelling of 20775730272 in words is "twenty billion, seven hundred seventy-five million, seven hundred thirty thousand, two hundred seventy-two".