21343141343 has 16 divisors (see below), whose sum is σ = 22335445440. Its totient is φ = 20376787200.

The previous prime is 21343141321. The next prime is 21343141349. The reversal of 21343141343 is 34314134312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21343141343 - 2²⁴ = 21326364127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343141349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471038 + ... + 514356.

It is an arithmetic number, because the mean of its divisors is an integer number (1395965340).

Almost surely, 2^21343141343 is an apocalyptic number.

21343141343 is a deficient number, since it is larger than the sum of its proper divisors (992304097).

21343141343 is a wasteful number, since it uses less digits than its factorization.

21343141343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43618.

The product of its digits is 10368, while the sum is 29.

Adding to 21343141343 its reverse (34314134312), we get a palindrome (55657275655).

The spelling of 21343141343 in words is "twenty-one billion, three hundred forty-three million, one hundred forty-one thousand, three hundred forty-three".