21341444444 has 12 divisors (see below), whose sum is σ = 37351477800. Its totient is φ = 10669593648.

The previous prime is 21341444437. The next prime is 21341444459. The reversal of 21341444444 is 44444414312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238859 + ... + 315810.

It is an arithmetic number, because the mean of its divisors is an integer number (3112623150).

Almost surely, 2^21341444444 is an apocalyptic number.

It is an amenable number.

21341444444 is a deficient number, since it is larger than the sum of its proper divisors (16010033356).

21341444444 is a wasteful number, since it uses less digits than its factorization.

21341444444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564292 (or 564290 counting only the distinct ones).

The product of its digits is 98304, while the sum is 35.

Adding to 21341444444 its reverse (44444414312), we get a palindrome (65785858756).

The spelling of 21341444444 in words is "twenty-one billion, three hundred forty-one million, four hundred forty-four thousand, four hundred forty-four".