21641441411363 has 4 divisors (see below), whose sum is σ = 22780464643560. Its totient is φ = 20502418179168.

The previous prime is 21641441411333. The next prime is 21641441411377. The reversal of 21641441411363 is 36311414414612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21641441411363 - 2²⁴ = 21641424634147 is a prime.

It is a super-2 number, since 2×21641441411363² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21641441411363.

It is not an unprimeable number, because it can be changed into a prime (21641441411323) 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, 569511616070 + ... + 569511616107.

It is an arithmetic number, because the mean of its divisors is an integer number (5695116160890).

Almost surely, 2^{21641441411363} is an apocalyptic number.

21641441411363 is a deficient number, since it is larger than the sum of its proper divisors (1139023232197).

21641441411363 is a wasteful number, since it uses less digits than its factorization.

21641441411363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139023232196.

The product of its digits is 165888, while the sum is 41.

Adding to 21641441411363 its reverse (36311414414612), we get a palindrome (57952855825975).

The spelling of 21641441411363 in words is "twenty-one trillion, six hundred forty-one billion, four hundred forty-one million, four hundred eleven thousand, three hundred sixty-three".