23887987993 has 8 divisors (see below), whose sum is σ = 24032118600. Its totient is φ = 23744290560.

The previous prime is 23887987987. The next prime is 23887987999. The reversal of 23887987993 is 39978978832.

It is an interprime number because it is at equal distance from previous prime (23887987987) and next prime (23887987999).

It can be written as a sum of positive squares in 4 ways, for example, as 7175445264 + 16712542729 = 84708^2 + 129277^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23887987993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23887987999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2673 + ... + 218593.

It is an arithmetic number, because the mean of its divisors is an integer number (3004014825).

Almost surely, 2^23887987993 is an apocalyptic number.

It is an amenable number.

23887987993 is a deficient number, since it is larger than the sum of its proper divisors (144130607).

23887987993 is a wasteful number, since it uses less digits than its factorization.

23887987993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216587.

The product of its digits is 329204736, while the sum is 73.

The spelling of 23887987993 in words is "twenty-three billion, eight hundred eighty-seven million, nine hundred eighty-seven thousand, nine hundred ninety-three".