21340453341 has 16 divisors (see below), whose sum is σ = 29081664000. Its totient is φ = 13915530288.

The previous prime is 21340453291. The next prime is 21340453363. The reversal of 21340453341 is 14335404312.

It is not a de Polignac number, because 21340453341 - 2¹³ = 21340445149 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21340453299 and 21340453308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21340453441) 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, 267711 + ... + 338156.

It is an arithmetic number, because the mean of its divisors is an integer number (1817604000).

Almost surely, 2^21340453341 is an apocalyptic number.

It is an amenable number.

21340453341 is a deficient number, since it is larger than the sum of its proper divisors (7741210659).

21340453341 is a wasteful number, since it uses less digits than its factorization.

21340453341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606128.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 21340453341 its reverse (14335404312), we get a palindrome (35675857653).

The spelling of 21340453341 in words is "twenty-one billion, three hundred forty million, four hundred fifty-three thousand, three hundred forty-one".