23218400872387 has 48 divisors (see below), whose sum is σ = 29004285055680. Its totient is φ = 18464727859200.

The previous prime is 23218400872333. The next prime is 23218400872399. The reversal of 23218400872387 is 78327800481232.

It is a de Polignac number, because none of the positive numbers 2^k-23218400872387 is a prime.

It is a super-3 number, since 3×23218400872387³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (23218400872307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 613234837 + ... + 613272697.

It is an arithmetic number, because the mean of its divisors is an integer number (604255938660).

Almost surely, 2^{23218400872387} is an apocalyptic number.

23218400872387 is a deficient number, since it is larger than the sum of its proper divisors (5785884183293).

23218400872387 is a wasteful number, since it uses less digits than its factorization.

23218400872387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48332 (or 48325 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 55.

The spelling of 23218400872387 in words is "twenty-three trillion, two hundred eighteen billion, four hundred million, eight hundred seventy-two thousand, three hundred eighty-seven".