21895754112 has 512 divisors, whose sum is σ = 71542310400. Its totient is φ = 6646800384.

The previous prime is 21895754053. The next prime is 21895754173. The reversal of 21895754112 is 21145759812.

21895754112 is a `hidden beast` number, since 2 + 1 + 8 + 95 + 7 + 541 + 12 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 204633163 + ... + 204633269.

It is an arithmetic number, because the mean of its divisors is an integer number (139731075).

Almost surely, 2^21895754112 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 21895754112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35771155200).

21895754112 is an abundant number, since it is smaller than the sum of its proper divisors (49646556288).

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

21895754112 is an equidigital number, since it uses as much as digits as its factorization.

21895754112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 172 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The spelling of 21895754112 in words is "twenty-one billion, eight hundred ninety-five million, seven hundred fifty-four thousand, one hundred twelve".