20533544472 has 96 divisors (see below), whose sum is σ = 59928372720. Its totient is φ = 5845754880.

The previous prime is 20533544429. The next prime is 20533544477. The reversal of 20533544472 is 27444533502.

It is a self number, because there is not a number n which added to its sum of digits gives 20533544472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533544477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 299388 + ... + 361524.

Almost surely, 2^20533544472 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 20533544472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29964186360).

20533544472 is an abundant number, since it is smaller than the sum of its proper divisors (39394828248).

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

20533544472 is a wasteful number, since it uses less digits than its factorization.

20533544472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62441 (or 62430 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 39.

The spelling of 20533544472 in words is "twenty billion, five hundred thirty-three million, five hundred forty-four thousand, four hundred seventy-two".