23606772221 has 4 divisors (see below), whose sum is σ = 23681241852. Its totient is φ = 23532302592.

The previous prime is 23606772199. The next prime is 23606772239. The reversal of 23606772221 is 12227760632.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1102572025 + 22504200196 = 33205^2 + 150014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23606772221 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 (23606772121) 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, 37234340 + ... + 37234973.

It is an arithmetic number, because the mean of its divisors is an integer number (5920310463).

Almost surely, 2^23606772221 is an apocalyptic number.

It is an amenable number.

23606772221 is a deficient number, since it is larger than the sum of its proper divisors (74469631).

23606772221 is an equidigital number, since it uses as much as digits as its factorization.

23606772221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74469630.

The product of its (nonzero) digits is 84672, while the sum is 38.

The spelling of 23606772221 in words is "twenty-three billion, six hundred six million, seven hundred seventy-two thousand, two hundred twenty-one".