23402064221 has 12 divisors (see below), whose sum is σ = 25021754172. Its totient is φ = 21811464576.

The previous prime is 23402064211. The next prime is 23402064253. The reversal of 23402064221 is 12246020432.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9077325625 + 14324738596 = 95275^2 + 119686^2 .

It is not a de Polignac number, because 23402064221 - 2⁶ = 23402064157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23402064211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115475 + ... + 245231.

It is an arithmetic number, because the mean of its divisors is an integer number (2085146181).

Almost surely, 2^23402064221 is an apocalyptic number.

It is an amenable number.

23402064221 is a deficient number, since it is larger than the sum of its proper divisors (1619689951).

23402064221 is a wasteful number, since it uses less digits than its factorization.

23402064221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129980 (or 129877 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 23402064221 its reverse (12246020432), we get a palindrome (35648084653).

The spelling of 23402064221 in words is "twenty-three billion, four hundred two million, sixty-four thousand, two hundred twenty-one".