23105304181 has 4 divisors (see below), whose sum is σ = 23105618572. Its totient is φ = 23104989792.

The previous prime is 23105304169. The next prime is 23105304259. The reversal of 23105304181 is 18140350132.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 23014407025 + 90897156 = 151705^2 + 9534^2 .

It is a cyclic number.

It is not a de Polignac number, because 23105304181 - 2¹¹ = 23105302133 is a prime.

It is a super-2 number, since 2×23105304181² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23105304161) 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, 18505 + ... + 215761.

It is an arithmetic number, because the mean of its divisors is an integer number (5776404643).

Almost surely, 2^23105304181 is an apocalyptic number.

It is an amenable number.

23105304181 is a deficient number, since it is larger than the sum of its proper divisors (314391).

23105304181 is a wasteful number, since it uses less digits than its factorization.

23105304181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314390.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 23105304181 in words is "twenty-three billion, one hundred five million, three hundred four thousand, one hundred eighty-one".