21943634912 has 48 divisors (see below), whose sum is σ = 43871484384. Its totient is φ = 10802880000.

The previous prime is 21943634873. The next prime is 21943634917.

21943634912 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21943634912² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21943634917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566237 + ... + 603747.

It is an arithmetic number, because the mean of its divisors is an integer number (913989258).

Almost surely, 2^21943634912 is an apocalyptic number.

It is an amenable number.

21943634912 is a deficient number, since it is larger than the sum of its proper divisors (21927849472).

21943634912 is a wasteful number, since it uses less digits than its factorization.

21943634912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37803 (or 37795 counting only the distinct ones).

The product of its digits is 279936, while the sum is 44.

The spelling of 21943634912 in words is "twenty-one billion, nine hundred forty-three million, six hundred thirty-four thousand, nine hundred twelve".