23654344221 has 40 divisors (see below), whose sum is σ = 37496927160. Its totient is φ = 14809070592.

The previous prime is 23654344199. The next prime is 23654344229. The reversal of 23654344221 is 12244345632.

It can be written as a sum of positive squares in 4 ways, for example, as 12970020996 + 10684323225 = 113886^2 + 103365^2 .

It is not a de Polignac number, because 23654344221 - 2¹⁰ = 23654343197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23654344229) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 610495 + ... + 648083.

It is an arithmetic number, because the mean of its divisors is an integer number (937423179).

Almost surely, 2^23654344221 is an apocalyptic number.

It is an amenable number.

23654344221 is a deficient number, since it is larger than the sum of its proper divisors (13842582939).

23654344221 is a wasteful number, since it uses less digits than its factorization.

23654344221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38075 (or 38066 counting only the distinct ones).

The product of its digits is 138240, while the sum is 36.

Adding to 23654344221 its reverse (12244345632), we get a palindrome (35898689853).

The spelling of 23654344221 in words is "twenty-three billion, six hundred fifty-four million, three hundred forty-four thousand, two hundred twenty-one".