23173070220721 has 8 divisors (see below), whose sum is σ = 23618563761600. Its totient is φ = 22729693039440.

The previous prime is 23173070220697. The next prime is 23173070220749. The reversal of 23173070220721 is 12702207037132.

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

It is a cyclic number.

It is not a de Polignac number, because 23173070220721 - 2²⁵ = 23173036666289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23173070220121) 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, 529067791 + ... + 529111588.

It is an arithmetic number, because the mean of its divisors is an integer number (2952320470200).

Almost surely, 2^{23173070220721} is an apocalyptic number.

It is an amenable number.

23173070220721 is a deficient number, since it is larger than the sum of its proper divisors (445493540879).

23173070220721 is a wasteful number, since it uses less digits than its factorization.

23173070220721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058179799.

The product of its (nonzero) digits is 49392, while the sum is 37.

Adding to 23173070220721 its reverse (12702207037132), we get a palindrome (35875277257853).

The spelling of 23173070220721 in words is "twenty-three trillion, one hundred seventy-three billion, seventy million, two hundred twenty thousand, seven hundred twenty-one".