23181865955 has 8 divisors (see below), whose sum is σ = 27821079072. Its totient is φ = 18543599488.

The previous prime is 23181865943. The next prime is 23181865961. The reversal of 23181865955 is 55956818132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23181865955 - 2⁶ = 23181865891 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23181865897 and 23181865906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181622 + ... + 281691.

It is an arithmetic number, because the mean of its divisors is an integer number (3477634884).

Almost surely, 2^23181865955 is an apocalyptic number.

23181865955 is a deficient number, since it is larger than the sum of its proper divisors (4639213117).

23181865955 is a wasteful number, since it uses less digits than its factorization.

23181865955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473325.

The product of its digits is 2592000, while the sum is 53.

The spelling of 23181865955 in words is "twenty-three billion, one hundred eighty-one million, eight hundred sixty-five thousand, nine hundred fifty-five".