21234034363 has 2 divisors, whose sum is σ = 21234034364. Its totient is φ = 21234034362.

The previous prime is 21234034361. The next prime is 21234034441. The reversal of 21234034363 is 36343043212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21234034363 - 2¹ = 21234034361 is a prime.

Together with 21234034361, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21234034361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10617017181 + 10617017182.

It is an arithmetic number, because the mean of its divisors is an integer number (10617017182).

Almost surely, 2^21234034363 is an apocalyptic number.

21234034363 is a deficient number, since it is larger than the sum of its proper divisors (1).

21234034363 is an equidigital number, since it uses as much as digits as its factorization.

21234034363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 21234034363 its reverse (36343043212), we get a palindrome (57577077575).

The spelling of 21234034363 in words is "twenty-one billion, two hundred thirty-four million, thirty-four thousand, three hundred sixty-three".