21734243113 has 16 divisors (see below), whose sum is σ = 25112393280. Its totient is φ = 18590515200.

The previous prime is 21734243057. The next prime is 21734243119. The reversal of 21734243113 is 31134243712.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21734243113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21734243119) 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, 674473 + ... + 705961.

It is an arithmetic number, because the mean of its divisors is an integer number (1569524580).

Almost surely, 2^21734243113 is an apocalyptic number.

It is an amenable number.

21734243113 is a deficient number, since it is larger than the sum of its proper divisors (3378150167).

21734243113 is a wasteful number, since it uses less digits than its factorization.

21734243113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35208.

The product of its digits is 12096, while the sum is 31.

Adding to 21734243113 its reverse (31134243712), we get a palindrome (52868486825).

The spelling of 21734243113 in words is "twenty-one billion, seven hundred thirty-four million, two hundred forty-three thousand, one hundred thirteen".