21350413343 has 16 divisors (see below), whose sum is σ = 25686706176. Its totient is φ = 17349763200.

The previous prime is 21350413333. The next prime is 21350413387. The reversal of 21350413343 is 34331405312.

It is not a de Polignac number, because 21350413343 - 2¹² = 21350409247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21350413303) 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 in 15 ways as a sum of consecutive naturals, for example, 568583 + ... + 604968.

It is an arithmetic number, because the mean of its divisors is an integer number (1605419136).

Almost surely, 2^21350413343 is an apocalyptic number.

21350413343 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21350413343 is a deficient number, since it is larger than the sum of its proper divisors (4336292833).

21350413343 is a wasteful number, since it uses less digits than its factorization.

21350413343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173694.

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 21350413343 its reverse (34331405312), we get a palindrome (55681818655).

The spelling of 21350413343 in words is "twenty-one billion, three hundred fifty million, four hundred thirteen thousand, three hundred forty-three".