23981217169 has 16 divisors (see below), whose sum is σ = 29888965120. Its totient is φ = 18733965120.

The previous prime is 23981217163. The next prime is 23981217287. The reversal of 23981217169 is 96171218932.

It is a happy number.

It is not a de Polignac number, because 23981217169 - 2⁹ = 23981216657 is a prime.

It is a super-2 number, since 2×23981217169² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23981217163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1660722 + ... + 1675099.

It is an arithmetic number, because the mean of its divisors is an integer number (1868060320).

Almost surely, 2^23981217169 is an apocalyptic number.

It is an amenable number.

23981217169 is a deficient number, since it is larger than the sum of its proper divisors (5907747951).

23981217169 is a wasteful number, since it uses less digits than its factorization.

23981217169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335920.

The product of its digits is 326592, while the sum is 49.

The spelling of 23981217169 in words is "twenty-three billion, nine hundred eighty-one million, two hundred seventeen thousand, one hundred sixty-nine".