21183211896 has 256 divisors, whose sum is σ = 72167915520. Its totient is φ = 5011200000.

The previous prime is 21183211883. The next prime is 21183211897. The reversal of 21183211896 is 69811238112.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21183211897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 963021 + ... + 984771.

It is an arithmetic number, because the mean of its divisors is an integer number (281905920).

Almost surely, 2^21183211896 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 21183211896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36083957760).

21183211896 is an abundant number, since it is smaller than the sum of its proper divisors (50984703624).

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

21183211896 is a wasteful number, since it uses less digits than its factorization.

21183211896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21826 (or 21822 counting only the distinct ones).

The product of its digits is 41472, while the sum is 42.

The spelling of 21183211896 in words is "twenty-one billion, one hundred eighty-three million, two hundred eleven thousand, eight hundred ninety-six".