21623132364005 has 16 divisors (see below), whose sum is σ = 26103837392640. Its totient is φ = 17194459099392.

The previous prime is 21623132363993. The next prime is 21623132364019. The reversal of 21623132364005 is 50046323132612.

It is a cyclic number.

It is not a de Polignac number, because 21623132364005 - 2¹⁸ = 21623132101861 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21623132364005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32542541 + ... + 33200349.

It is an arithmetic number, because the mean of its divisors is an integer number (1631489837040).

Almost surely, 2^{21623132364005} is an apocalyptic number.

It is an amenable number.

21623132364005 is a deficient number, since it is larger than the sum of its proper divisors (4480705028635).

21623132364005 is a wasteful number, since it uses less digits than its factorization.

21623132364005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697348.

The product of its (nonzero) digits is 155520, while the sum is 38.

Adding to 21623132364005 its reverse (50046323132612), we get a palindrome (71669455496617).

The spelling of 21623132364005 in words is "twenty-one trillion, six hundred twenty-three billion, one hundred thirty-two million, three hundred sixty-four thousand, five".