21631027373205 has 16 divisors (see below), whose sum is σ = 35726083920384. Its totient is φ = 11164401224640.

The previous prime is 21631027373201. The next prime is 21631027373239. The reversal of 21631027373205 is 50237372013612.

It is not a de Polignac number, because 21631027373205 - 2² = 21631027373201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21631027373201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23259168754 + ... + 23259169683.

It is an arithmetic number, because the mean of its divisors is an integer number (2232880245024).

Almost surely, 2^{21631027373205} is an apocalyptic number.

It is an amenable number.

21631027373205 is a deficient number, since it is larger than the sum of its proper divisors (14095056547179).

21631027373205 is a wasteful number, since it uses less digits than its factorization.

21631027373205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46518338476.

The product of its (nonzero) digits is 317520, while the sum is 42.

Adding to 21631027373205 its reverse (50237372013612), we get a palindrome (71868399386817).

The spelling of 21631027373205 in words is "twenty-one trillion, six hundred thirty-one billion, twenty-seven million, three hundred seventy-three thousand, two hundred five".