16872218867 has 4 divisors (see below), whose sum is σ = 19282535856. Its totient is φ = 14461901880.

The previous prime is 16872218863. The next prime is 16872218873. The reversal of 16872218867 is 76881227861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76881227861 = 24443 ⋅3145327.

It is a cyclic number.

It is not a de Polignac number, because 16872218867 - 2² = 16872218863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16872218863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1205158484 + ... + 1205158497.

It is an arithmetic number, because the mean of its divisors is an integer number (4820633964).

Almost surely, 2^16872218867 is an apocalyptic number.

16872218867 is a deficient number, since it is larger than the sum of its proper divisors (2410316989).

16872218867 is an equidigital number, since it uses as much as digits as its factorization.

16872218867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410316988.

The product of its digits is 3612672, while the sum is 56.

The spelling of 16872218867 in words is "sixteen billion, eight hundred seventy-two million, two hundred eighteen thousand, eight hundred sixty-seven".