21331598463 has 18 divisors (see below), whose sum is σ = 35215981112. Its totient is φ = 12188822400.

The previous prime is 21331598413. The next prime is 21331598473. The reversal of 21331598463 is 36489513312.

21331598463 is a `hidden beast` number, since 2 + 1 + 33 + 159 + 8 + 463 = 666.

It is not a de Polignac number, because 21331598463 - 2¹⁰ = 21331597439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331598413) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1150063 + ... + 1168463.

Almost surely, 2^21331598463 is an apocalyptic number.

21331598463 is a deficient number, since it is larger than the sum of its proper divisors (13884382649).

21331598463 is an frugal number, since it uses more digits than its factorization.

21331598463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36815 (or 18411 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The spelling of 21331598463 in words is "twenty-one billion, three hundred thirty-one million, five hundred ninety-eight thousand, four hundred sixty-three".