21306563341 has 8 divisors (see below), whose sum is σ = 24353136000. Its totient is φ = 18260685168.

The previous prime is 21306563323. The next prime is 21306563351. The reversal of 21306563341 is 14336560312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21306563341 - 2²¹ = 21304466189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21306563297 and 21306563306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21306563351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106126 + ... + 232111.

It is an arithmetic number, because the mean of its divisors is an integer number (3044142000).

Almost surely, 2^21306563341 is an apocalyptic number.

It is an amenable number.

21306563341 is a deficient number, since it is larger than the sum of its proper divisors (3046572659).

21306563341 is an equidigital number, since it uses as much as digits as its factorization.

21306563341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347243.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 21306563341 in words is "twenty-one billion, three hundred six million, five hundred sixty-three thousand, three hundred forty-one".