23953840911 has 384 divisors, whose sum is σ = 52130856960. Its totient is φ = 10581580800.

The previous prime is 23953840829. The next prime is 23953840913. The reversal of 23953840911 is 11904835932.

It is a happy number.

23953840911 is a `hidden beast` number, since 23 + 9 + 538 + 4 + 0 + 91 + 1 = 666.

It is not a de Polignac number, because 23953840911 - 2¹⁰ = 23953839887 is a prime.

It is a super-3 number, since 3×23953840911³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23953840913) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 328134771 + ... + 328134843.

It is an arithmetic number, because the mean of its divisors is an integer number (135757440).

Almost surely, 2^23953840911 is an apocalyptic number.

23953840911 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23953840911 is an abundant number, since it is smaller than the sum of its proper divisors (28177016049).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23953840911 is a wasteful number, since it uses less digits than its factorization.

23953840911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 23953840911 in words is "twenty-three billion, nine hundred fifty-three million, eight hundred forty thousand, nine hundred eleven".