21716725008223 has 8 divisors (see below), whose sum is σ = 25168679285760. Its totient is φ = 18352161978360.

The previous prime is 21716725008089. The next prime is 21716725008313. The reversal of 21716725008223 is 32280052761712.

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

It is not a de Polignac number, because 21716725008223 - 2³⁷ = 21579286054751 is a prime.

It is a super-2 number, since 2×21716725008223² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21716725008023) 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, 21847811383 + ... + 21847812376.

It is an arithmetic number, because the mean of its divisors is an integer number (3146084910720).

Almost surely, 2^{21716725008223} is an apocalyptic number.

21716725008223 is a deficient number, since it is larger than the sum of its proper divisors (3451954277537).

21716725008223 is an equidigital number, since it uses as much as digits as its factorization.

21716725008223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43695623837.

The product of its (nonzero) digits is 564480, while the sum is 46.

Adding to 21716725008223 its reverse (32280052761712), we get a palindrome (53996777769935).

The spelling of 21716725008223 in words is "twenty-one trillion, seven hundred sixteen billion, seven hundred twenty-five million, eight thousand, two hundred twenty-three".