23040220671647 has 4 divisors (see below), whose sum is σ = 23109828589416. Its totient is φ = 22970612753880.

The previous prime is 23040220671493. The next prime is 23040220671691. The reversal of 23040220671647 is 74617602204032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23040220671647 - 2⁴⁰ = 21940709043871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23040220671598 and 23040220671607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23040220671847) 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, 34803958388 + ... + 34803959049.

It is an arithmetic number, because the mean of its divisors is an integer number (5777457147354).

Almost surely, 2^{23040220671647} is an apocalyptic number.

23040220671647 is a deficient number, since it is larger than the sum of its proper divisors (69607917769).

23040220671647 is an equidigital number, since it uses as much as digits as its factorization.

23040220671647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69607917768.

The product of its (nonzero) digits is 677376, while the sum is 44.

Adding to 23040220671647 its reverse (74617602204032), we get a palindrome (97657822875679).

The spelling of 23040220671647 in words is "twenty-three trillion, forty billion, two hundred twenty million, six hundred seventy-one thousand, six hundred forty-seven".