23406620221 has 8 divisors (see below), whose sum is σ = 24941339640. Its totient is φ = 21889440768.

The previous prime is 23406620219. The next prime is 23406620227. The reversal of 23406620221 is 12202660432.

It can be written as a sum of positive squares in 4 ways, for example, as 93605625 + 23313014596 = 9675^2 + 152686^2 .

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 23406620221 - 2¹ = 23406620219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23406620221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23406620227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4382236 + ... + 4387573.

It is an arithmetic number, because the mean of its divisors is an integer number (3117667455).

Almost surely, 2^23406620221 is an apocalyptic number.

It is an amenable number.

23406620221 is a deficient number, since it is larger than the sum of its proper divisors (1534719419).

23406620221 is a wasteful number, since it uses less digits than its factorization.

23406620221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8769983.

The product of its (nonzero) digits is 6912, while the sum is 28.

The spelling of 23406620221 in words is "twenty-three billion, four hundred six million, six hundred twenty thousand, two hundred twenty-one".