21845822499712 has 64 divisors (see below), whose sum is σ = 47670033070800. Its totient is φ = 9925890924544.

The previous prime is 21845822499701. The next prime is 21845822499731. The reversal of 21845822499712 is 21799422854812.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173030698 + ... + 173156905.

Almost surely, 2^{21845822499712} is an apocalyptic number.

It is an amenable number.

21845822499712 is an abundant number, since it is smaller than the sum of its proper divisors (25824210571088).

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

21845822499712 is a wasteful number, since it uses less digits than its factorization.

21845822499712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346187663 (or 346187651 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 64.

The spelling of 21845822499712 in words is "twenty-one trillion, eight hundred forty-five billion, eight hundred twenty-two million, four hundred ninety-nine thousand, seven hundred twelve".