21623004616064 has 32 divisors (see below), whose sum is σ = 43110498828600. Its totient is φ = 10803114714112.

The previous prime is 21623004616039. The next prime is 21623004616067. The reversal of 21623004616064 is 46061640032612.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21623004616067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65362442 + ... + 65692425.

Almost surely, 2^{21623004616064} is an apocalyptic number.

It is an amenable number.

21623004616064 is a deficient number, since it is larger than the sum of its proper divisors (21487494212536).

21623004616064 is a wasteful number, since it uses less digits than its factorization.

21623004616064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131056170 (or 131056158 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 41.

Adding to 21623004616064 its reverse (46061640032612), we get a palindrome (67684644648676).

The spelling of 21623004616064 in words is "twenty-one trillion, six hundred twenty-three billion, four million, six hundred sixteen thousand, sixty-four".