23172120027 has 24 divisors (see below), whose sum is σ = 38713269504. Its totient is φ = 13081675824.

The previous prime is 23172120007. The next prime is 23172120061. The reversal of 23172120027 is 72002127132.

It is not a de Polignac number, because 23172120027 - 2¹⁸ = 23171857883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23172120007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2210503 + ... + 2220960.

It is an arithmetic number, because the mean of its divisors is an integer number (1613052896).

Almost surely, 2^23172120027 is an apocalyptic number.

23172120027 is a deficient number, since it is larger than the sum of its proper divisors (15541149477).

23172120027 is a wasteful number, since it uses less digits than its factorization.

23172120027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4431559 (or 4431556 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

Adding to 23172120027 its reverse (72002127132), we get a palindrome (95174247159).

The spelling of 23172120027 in words is "twenty-three billion, one hundred seventy-two million, one hundred twenty thousand, twenty-seven".