21606000113023 has 8 divisors (see below), whose sum is σ = 23308581698928. Its totient is φ = 19951378571904.

The previous prime is 21606000112981. The next prime is 21606000113039. The reversal of 21606000113023 is 32031100060612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21606000113023 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 (21606000113723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11990010261 + ... + 11990012062.

It is an arithmetic number, because the mean of its divisors is an integer number (2913572712366).

Almost surely, 2^{21606000113023} is an apocalyptic number.

21606000113023 is a deficient number, since it is larger than the sum of its proper divisors (1702581585905).

21606000113023 is a wasteful number, since it uses less digits than its factorization.

21606000113023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23980022393.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21606000113023 its reverse (32031100060612), we get a palindrome (53637100173635).

The spelling of 21606000113023 in words is "twenty-one trillion, six hundred six billion, one hundred thirteen thousand, twenty-three".