21632016216383 has 4 divisors (see below), whose sum is σ = 21653713324920. Its totient is φ = 21610319107848.

The previous prime is 21632016216353. The next prime is 21632016216457. The reversal of 21632016216383 is 38361261023612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21632016216383 - 2²⁶ = 21631949107519 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 (21632016216313) 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 3 ways as a sum of consecutive naturals, for example, 10848552773 + ... + 10848554766.

It is an arithmetic number, because the mean of its divisors is an integer number (5413428331230).

Almost surely, 2^{21632016216383} is an apocalyptic number.

21632016216383 is a deficient number, since it is larger than the sum of its proper divisors (21697108537).

21632016216383 is an equidigital number, since it uses as much as digits as its factorization.

21632016216383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21697108536.

The product of its (nonzero) digits is 373248, while the sum is 44.

Adding to 21632016216383 its reverse (38361261023612), we get a palindrome (59993277239995).

The spelling of 21632016216383 in words is "twenty-one trillion, six hundred thirty-two billion, sixteen million, two hundred sixteen thousand, three hundred eighty-three".