21636411414613 has 4 divisors (see below), whose sum is σ = 21636423260640. Its totient is φ = 21636399568588.

The previous prime is 21636411414581. The next prime is 21636411414619. The reversal of 21636411414613 is 31641411463612.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21636411414613 - 2⁵ = 21636411414581 is a prime.

It is a super-3 number, since 3×21636411414613³ (a number of 41 digits) contains 333 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 21636411414613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21636411414619) 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, 2538745 + ... + 7051102.

It is an arithmetic number, because the mean of its divisors is an integer number (5409105815160).

Almost surely, 2^{21636411414613} is an apocalyptic number.

It is an amenable number.

21636411414613 is a deficient number, since it is larger than the sum of its proper divisors (11846027).

21636411414613 is an equidigital number, since it uses as much as digits as its factorization.

21636411414613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11846026.

The product of its digits is 248832, while the sum is 43.

The spelling of 21636411414613 in words is "twenty-one trillion, six hundred thirty-six billion, four hundred eleven million, four hundred fourteen thousand, six hundred thirteen".