218854893 has 4 divisors (see below), whose sum is σ = 291806528. Its totient is φ = 145903260.

The previous prime is 218854879. The next prime is 218854931. The reversal of 218854893 is 398458812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 218854893 - 2¹⁷ = 218723821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218854693) 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, 36475813 + ... + 36475818.

It is an arithmetic number, because the mean of its divisors is an integer number (72951632).

Almost surely, 2^218854893 is an apocalyptic number.

It is an amenable number.

218854893 is a deficient number, since it is larger than the sum of its proper divisors (72951635).

218854893 is an equidigital number, since it uses as much as digits as its factorization.

218854893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72951634.

The product of its digits is 552960, while the sum is 48.

The square root of 218854893 is about 14793.7450633705. The cubic root of 218854893 is about 602.6318581030.

The spelling of 218854893 in words is "two hundred eighteen million, eight hundred fifty-four thousand, eight hundred ninety-three".