21943234912 has 12 divisors (see below), whose sum is σ = 43200743796. Its totient is φ = 10971617440.

The previous prime is 21943234877. The next prime is 21943234913.

It is a happy number.

21943234912 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21943234913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342863014 + ... + 342863077.

It is an arithmetic number, because the mean of its divisors is an integer number (3600061983).

Almost surely, 2^21943234912 is an apocalyptic number.

It is an amenable number.

21943234912 is a deficient number, since it is larger than the sum of its proper divisors (21257508884).

21943234912 is an equidigital number, since it uses as much as digits as its factorization.

21943234912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685726101 (or 685726093 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

The spelling of 21943234912 in words is "twenty-one billion, nine hundred forty-three million, two hundred thirty-four thousand, nine hundred twelve".