218093654867 has 4 divisors (see below), whose sum is σ = 237920350776. Its totient is φ = 198266958960.

The previous prime is 218093654861. The next prime is 218093654869. The reversal of 218093654867 is 768456390812.

218093654867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 218093654867 - 2⁶ = 218093654803 is a prime.

It is a super-2 number, since 2×218093654867² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218093654861) 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 3 ways as a sum of consecutive naturals, for example, 9913347938 + ... + 9913347959.

It is an arithmetic number, because the mean of its divisors is an integer number (59480087694).

It is a 1-persistent number, because it is pandigital, but 2⋅218093654867 = 436187309734 is not.

Almost surely, 2^218093654867 is an apocalyptic number.

218093654867 is a deficient number, since it is larger than the sum of its proper divisors (19826695909).

218093654867 is a wasteful number, since it uses less digits than its factorization.

218093654867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19826695908.

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 218093654867 in words is "two hundred eighteen billion, ninety-three million, six hundred fifty-four thousand, eight hundred sixty-seven".