20533966368 has 288 divisors, whose sum is σ = 60057990720. Its totient is φ = 6121267200.

The previous prime is 20533966367. The next prime is 20533966373. The reversal of 20533966368 is 86366933502.

It is a super-2 number, since 2×20533966368² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20533966368.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533966361) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 113447238 + ... + 113447418.

It is an arithmetic number, because the mean of its divisors is an integer number (208534690).

Almost surely, 2^20533966368 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 20533966368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30028995360).

20533966368 is an abundant number, since it is smaller than the sum of its proper divisors (39524024352).

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

20533966368 is a wasteful number, since it uses less digits than its factorization.

20533966368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 51.

The spelling of 20533966368 in words is "twenty billion, five hundred thirty-three million, nine hundred sixty-six thousand, three hundred sixty-eight".