23923406987 has 4 divisors (see below), whose sum is σ = 23983667856. Its totient is φ = 23863146120.

The previous prime is 23923406959. The next prime is 23923406989. The reversal of 23923406987 is 78960432932.

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 23923406987 - 2¹² = 23923402891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23923406989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30129839 + ... + 30130632.

It is an arithmetic number, because the mean of its divisors is an integer number (5995916964).

Almost surely, 2^23923406987 is an apocalyptic number.

23923406987 is a deficient number, since it is larger than the sum of its proper divisors (60260869).

23923406987 is an equidigital number, since it uses as much as digits as its factorization.

23923406987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60260868.

The product of its (nonzero) digits is 3919104, while the sum is 53.

The spelling of 23923406987 in words is "twenty-three billion, nine hundred twenty-three million, four hundred six thousand, nine hundred eighty-seven".