23005172011 has 4 divisors (see below), whose sum is σ = 23296376800. Its totient is φ = 22713967224.

The previous prime is 23005171993. The next prime is 23005172017. The reversal of 23005172011 is 11027150032.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 23005172011 - 2⁵ = 23005171979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23005172017) 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, 145602276 + ... + 145602433.

It is an arithmetic number, because the mean of its divisors is an integer number (5824094200).

Almost surely, 2^23005172011 is an apocalyptic number.

23005172011 is a deficient number, since it is larger than the sum of its proper divisors (291204789).

23005172011 is an equidigital number, since it uses as much as digits as its factorization.

23005172011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291204788.

The product of its (nonzero) digits is 420, while the sum is 22.

The spelling of 23005172011 in words is "twenty-three billion, five million, one hundred seventy-two thousand, eleven".