21140322244 has 6 divisors (see below), whose sum is σ = 36995563934. Its totient is φ = 10570161120.

The previous prime is 21140322223. The next prime is 21140322251. The reversal of 21140322244 is 44222304112.

It can be written as a sum of positive squares in only one way, i.e., 19019719744 + 2120602500 = 137912^2 + 46050^2 .

It is a super-2 number, since 2×21140322244² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2642540277 + ... + 2642540284.

Almost surely, 2^21140322244 is an apocalyptic number.

It is an amenable number.

21140322244 is a deficient number, since it is larger than the sum of its proper divisors (15855241690).

21140322244 is a wasteful number, since it uses less digits than its factorization.

21140322244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5285080565 (or 5285080563 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21140322244 its reverse (44222304112), we get a palindrome (65362626356).

The spelling of 21140322244 in words is "twenty-one billion, one hundred forty million, three hundred twenty-two thousand, two hundred forty-four".