21143304033244 has 12 divisors (see below), whose sum is σ = 37021487600664. Its totient is φ = 10565736147344.

The previous prime is 21143304033179. The next prime is 21143304033283. The reversal of 21143304033244 is 44233040334112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1478959279 + ... + 1478973574.

It is an arithmetic number, because the mean of its divisors is an integer number (3085123966722).

Almost surely, 2^{21143304033244} is an apocalyptic number.

It is an amenable number.

21143304033244 is a deficient number, since it is larger than the sum of its proper divisors (15878183567420).

21143304033244 is a wasteful number, since it uses less digits than its factorization.

21143304033244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2957934644 (or 2957934642 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 21143304033244 its reverse (44233040334112), we get a palindrome (65376344367356).

The spelling of 21143304033244 in words is "twenty-one trillion, one hundred forty-three billion, three hundred four million, thirty-three thousand, two hundred forty-four".