21616036331326 has 16 divisors (see below), whose sum is σ = 32499737075520. Its totient is φ = 10782791339040.

The previous prime is 21616036331293. The next prime is 21616036331359. The reversal of 21616036331326 is 62313363061612.

It is an interprime number because it is at equal distance from previous prime (21616036331293) and next prime (21616036331359).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86900740 + ... + 87149128.

It is an arithmetic number, because the mean of its divisors is an integer number (2031233567220).

Almost surely, 2^{21616036331326} is an apocalyptic number.

21616036331326 is a deficient number, since it is larger than the sum of its proper divisors (10883700744194).

21616036331326 is a wasteful number, since it uses less digits than its factorization.

21616036331326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349779.

The product of its (nonzero) digits is 419904, while the sum is 43.

Adding to 21616036331326 its reverse (62313363061612), we get a palindrome (83929399392938).

The spelling of 21616036331326 in words is "twenty-one trillion, six hundred sixteen billion, thirty-six million, three hundred thirty-one thousand, three hundred twenty-six".