21896840112 has 160 divisors (see below), whose sum is σ = 67051660800. Its totient is φ = 6153396480.

The previous prime is 21896840107. The next prime is 21896840113. The reversal of 21896840112 is 21104869812.

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

It is not an unprimeable number, because it can be changed into a prime (21896840113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 993403 + ... + 1015205.

It is an arithmetic number, because the mean of its divisors is an integer number (419072880).

Almost surely, 2^21896840112 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 21896840112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33525830400).

21896840112 is an abundant number, since it is smaller than the sum of its proper divisors (45154820688).

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

21896840112 is a wasteful number, since it uses less digits than its factorization.

21896840112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21896 (or 21876 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The spelling of 21896840112 in words is "twenty-one billion, eight hundred ninety-six million, eight hundred forty thousand, one hundred twelve".