23844378217 has 12 divisors (see below), whose sum is σ = 26227514880. Its totient is φ = 21661485560.

The previous prime is 23844378209. The next prime is 23844378251. The reversal of 23844378217 is 71287344832.

It is not a de Polignac number, because 23844378217 - 2³ = 23844378209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23844372217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105648 + ... + 242590.

It is an arithmetic number, because the mean of its divisors is an integer number (2185626240).

Almost surely, 2^23844378217 is an apocalyptic number.

It is an amenable number.

23844378217 is a deficient number, since it is larger than the sum of its proper divisors (2383136663).

23844378217 is a wasteful number, since it uses less digits than its factorization.

23844378217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138404 (or 138393 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 49.

The spelling of 23844378217 in words is "twenty-three billion, eight hundred forty-four million, three hundred seventy-eight thousand, two hundred seventeen".