20481895896 has 128 divisors (see below), whose sum is σ = 63878284800. Its totient is φ = 5316756480.

The previous prime is 20481895883. The next prime is 20481895927. The reversal of 20481895896 is 69859818402.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5484846 + ... + 5488578.

It is an arithmetic number, because the mean of its divisors is an integer number (499049100).

Almost surely, 2^20481895896 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 20481895896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31939142400).

20481895896 is an abundant number, since it is smaller than the sum of its proper divisors (43396388904).

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

20481895896 is a wasteful number, since it uses less digits than its factorization.

20481895896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6729 (or 6725 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 60.

The spelling of 20481895896 in words is "twenty billion, four hundred eighty-one million, eight hundred ninety-five thousand, eight hundred ninety-six".