20533915696 has 120 divisors (see below), whose sum is σ = 46997817840. Its totient is φ = 8664768000.

The previous prime is 20533915691. The next prime is 20533915697. The reversal of 20533915696 is 69651933502.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (20533915691) 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, 16707210 + ... + 16708438.

It is an arithmetic number, because the mean of its divisors is an integer number (391648482).

Almost surely, 2^20533915696 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 20533915696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23498908920).

20533915696 is an abundant number, since it is smaller than the sum of its proper divisors (26463902144).

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

20533915696 is a wasteful number, since it uses less digits than its factorization.

20533915696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563 (or 1550 counting only the distinct ones).

The product of its (nonzero) digits is 1312200, while the sum is 49.

The spelling of 20533915696 in words is "twenty billion, five hundred thirty-three million, nine hundred fifteen thousand, six hundred ninety-six".