21443100344 has 8 divisors (see below), whose sum is σ = 40205813160. Its totient is φ = 10721550168.

The previous prime is 21443100323. The next prime is 21443100377. The reversal of 21443100344 is 44300134412.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340193764 + ... + 1340193779.

It is an arithmetic number, because the mean of its divisors is an integer number (5025726645).

Almost surely, 2^21443100344 is an apocalyptic number.

It is an amenable number.

21443100344 is a deficient number, since it is larger than the sum of its proper divisors (18762712816).

21443100344 is a wasteful number, since it uses less digits than its factorization.

21443100344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2680387549 (or 2680387545 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21443100344 its reverse (44300134412), we get a palindrome (65743234756).

The spelling of 21443100344 in words is "twenty-one billion, four hundred forty-three million, one hundred thousand, three hundred forty-four".