21631435462353 has 16 divisors (see below), whose sum is σ = 28925313854976. Its totient is φ = 14379261811200.

The previous prime is 21631435462349. The next prime is 21631435462381. The reversal of 21631435462353 is 35326453413612.

It is not a de Polignac number, because 21631435462353 - 2² = 21631435462349 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21631435462753) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 17748928 + ... + 18928478.

It is an arithmetic number, because the mean of its divisors is an integer number (1807832115936).

Almost surely, 2^{21631435462353} is an apocalyptic number.

It is an amenable number.

21631435462353 is a deficient number, since it is larger than the sum of its proper divisors (7293878392623).

21631435462353 is a wasteful number, since it uses less digits than its factorization.

21631435462353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197224.

The product of its digits is 4665600, while the sum is 48.

Adding to 21631435462353 its reverse (35326453413612), we get a palindrome (56957888875965).

The spelling of 21631435462353 in words is "twenty-one trillion, six hundred thirty-one billion, four hundred thirty-five million, four hundred sixty-two thousand, three hundred fifty-three".