21843024349 has 2 divisors, whose sum is σ = 21843024350. Its totient is φ = 21843024348.

The previous prime is 21843024323. The next prime is 21843024389. The reversal of 21843024349 is 94342034812.

It is an a-pointer prime, because the next prime (21843024389) can be obtained adding 21843024349 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11544428025 + 10298596324 = 107445^2 + 101482^2 .

It is a cyclic number.

It is not a de Polignac number, because 21843024349 - 2¹¹ = 21843022301 is a prime.

It is a super-2 number, since 2×21843024349² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21843024389) by changing a digit.

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, 10921512174 + 10921512175.

It is an arithmetic number, because the mean of its divisors is an integer number (10921512175).

Almost surely, 2^21843024349 is an apocalyptic number.

It is an amenable number.

21843024349 is a deficient number, since it is larger than the sum of its proper divisors (1).

21843024349 is an equidigital number, since it uses as much as digits as its factorization.

21843024349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 21843024349 in words is "twenty-one billion, eight hundred forty-three million, twenty-four thousand, three hundred forty-nine".