23478822181 has 4 divisors (see below), whose sum is σ = 23479922592. Its totient is φ = 23477721772.

The previous prime is 23478822163. The next prime is 23478822187. The reversal of 23478822181 is 18122887432.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23478822181 - 2⁵ = 23478822149 is a prime.

It is a super-2 number, since 2×23478822181² (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 (23478822187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517555 + ... + 561088.

It is an arithmetic number, because the mean of its divisors is an integer number (5869980648).

Almost surely, 2^23478822181 is an apocalyptic number.

It is an amenable number.

23478822181 is a deficient number, since it is larger than the sum of its proper divisors (1100411).

23478822181 is a wasteful number, since it uses less digits than its factorization.

23478822181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100410.

The product of its digits is 344064, while the sum is 46.

The spelling of 23478822181 in words is "twenty-three billion, four hundred seventy-eight million, eight hundred twenty-two thousand, one hundred eighty-one".