20272409472 has 128 divisors (see below), whose sum is σ = 62106739200. Its totient is φ = 5738895360.

The previous prime is 20272409471. The next prime is 20272409501. The reversal of 20272409472 is 27490427202.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 20272409472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20272409471) 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, 258397 + ... + 327587.

It is an arithmetic number, because the mean of its divisors is an integer number (485208900).

Almost surely, 2^20272409472 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 20272409472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31053369600).

20272409472 is an abundant number, since it is smaller than the sum of its proper divisors (41834329728).

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

20272409472 is a wasteful number, since it uses less digits than its factorization.

20272409472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69324 (or 69312 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 39.

The spelling of 20272409472 in words is "twenty billion, two hundred seventy-two million, four hundred nine thousand, four hundred seventy-two".