23843117887 has 4 divisors (see below), whose sum is σ = 23985891216. Its totient is φ = 23700344560.

The previous prime is 23843117863. The next prime is 23843117939. The reversal of 23843117887 is 78871134832.

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 23843117887 - 2⁷ = 23843117759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23843117807) 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, 71386414 + ... + 71386747.

It is an arithmetic number, because the mean of its divisors is an integer number (5996472804).

Almost surely, 2^23843117887 is an apocalyptic number.

23843117887 is a deficient number, since it is larger than the sum of its proper divisors (142773329).

23843117887 is a wasteful number, since it uses less digits than its factorization.

23843117887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142773328.

The product of its digits is 1806336, while the sum is 52.

The spelling of 23843117887 in words is "twenty-three billion, eight hundred forty-three million, one hundred seventeen thousand, eight hundred eighty-seven".