21631441323454 has 8 divisors (see below), whose sum is σ = 32448323260080. Its totient is φ = 10815333570096.

The previous prime is 21631441323377. The next prime is 21631441323509. The reversal of 21631441323454 is 45432314413612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21631441323454.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193475959 + ... + 193587730.

It is an arithmetic number, because the mean of its divisors is an integer number (4056040407510).

Almost surely, 2^{21631441323454} is an apocalyptic number.

21631441323454 is a deficient number, since it is larger than the sum of its proper divisors (10816881936626).

21631441323454 is a wasteful number, since it uses less digits than its factorization.

21631441323454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387091634.

The product of its digits is 829440, while the sum is 43.

The spelling of 21631441323454 in words is "twenty-one trillion, six hundred thirty-one billion, four hundred forty-one million, three hundred twenty-three thousand, four hundred fifty-four".