23966378991 has 12 divisors (see below), whose sum is σ = 34657142832. Its totient is φ = 15959567616.

The previous prime is 23966378951. The next prime is 23966379007. The reversal of 23966378991 is 19987366932.

It is not a de Polignac number, because 23966378991 - 2¹⁷ = 23966247919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23966378941) 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, 1493106 + ... + 1509071.

It is an arithmetic number, because the mean of its divisors is an integer number (2888095236).

Almost surely, 2^23966378991 is an apocalyptic number.

23966378991 is a deficient number, since it is larger than the sum of its proper divisors (10690763841).

23966378991 is a wasteful number, since it uses less digits than its factorization.

23966378991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003070 (or 3003067 counting only the distinct ones).

The product of its digits is 26453952, while the sum is 63.

The spelling of 23966378991 in words is "twenty-three billion, nine hundred sixty-six million, three hundred seventy-eight thousand, nine hundred ninety-one".