21343134303 has 24 divisors (see below), whose sum is σ = 32576593920. Its totient is φ = 13437824400.

The previous prime is 21343134277. The next prime is 21343134317. The reversal of 21343134303 is 30343134312.

21343134303 is a `hidden beast` number, since 2 + 1 + 343 + 13 + 4 + 303 = 666.

It is not a de Polignac number, because 21343134303 - 2⁸ = 21343134047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343134343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 636223 + ... + 668928.

It is an arithmetic number, because the mean of its divisors is an integer number (1357358080).

Almost surely, 2^21343134303 is an apocalyptic number.

21343134303 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21343134303 is a deficient number, since it is larger than the sum of its proper divisors (11233459617).

21343134303 is a wasteful number, since it uses less digits than its factorization.

21343134303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305259 (or 1305256 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 21343134303 its reverse (30343134312), we get a palindrome (51686268615).

Subtracting 21343134303 from its reverse (30343134312), we obtain a palindrome (9000000009).

The spelling of 21343134303 in words is "twenty-one billion, three hundred forty-three million, one hundred thirty-four thousand, three hundred three".