21623545260341 has 4 divisors (see below), whose sum is σ = 21732206292000. Its totient is φ = 21514884228684.

The previous prime is 21623545260307. The next prime is 21623545260377. The reversal of 21623545260341 is 14306254532612.

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 21623545260341 - 2¹⁸ = 21623544998197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21623545260292 and 21623545260301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21623545266341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54330515531 + ... + 54330515928.

It is an arithmetic number, because the mean of its divisors is an integer number (5433051573000).

Almost surely, 2^{21623545260341} is an apocalyptic number.

It is an amenable number.

21623545260341 is a deficient number, since it is larger than the sum of its proper divisors (108661031659).

21623545260341 is a wasteful number, since it uses less digits than its factorization.

21623545260341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108661031658.

The product of its (nonzero) digits is 1036800, while the sum is 44.

Adding to 21623545260341 its reverse (14306254532612), we get a palindrome (35929799792953).

The spelling of 21623545260341 in words is "twenty-one trillion, six hundred twenty-three billion, five hundred forty-five million, two hundred sixty thousand, three hundred forty-one".