21263540630341 has 4 divisors (see below), whose sum is σ = 21265951744800. Its totient is φ = 21261129515884.

The previous prime is 21263540630309. The next prime is 21263540630357. The reversal of 21263540630341 is 14303604536212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21263540630341 - 2⁵ = 21263540630309 is a prime.

It is a super-3 number, since 3×21263540630341³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21263540630294 and 21263540630303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21263540636341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1205544001 + ... + 1205561638.

It is an arithmetic number, because the mean of its divisors is an integer number (5316487936200).

Almost surely, 2^{21263540630341} is an apocalyptic number.

It is an amenable number.

21263540630341 is a deficient number, since it is larger than the sum of its proper divisors (2411114459).

21263540630341 is an equidigital number, since it uses as much as digits as its factorization.

21263540630341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2411114458.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 21263540630341 in words is "twenty-one trillion, two hundred sixty-three billion, five hundred forty million, six hundred thirty thousand, three hundred forty-one".