218404814 has 24 divisors (see below), whose sum is σ = 349280040. Its totient is φ = 102404736.

The previous prime is 218404807. The next prime is 218404819. The reversal of 218404814 is 418404812.

218404814 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218404819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 218564 + ... + 219560.

It is an arithmetic number, because the mean of its divisors is an integer number (14553335).

Almost surely, 2^218404814 is an apocalyptic number.

218404814 is a deficient number, since it is larger than the sum of its proper divisors (130875226).

218404814 is a wasteful number, since it uses less digits than its factorization.

218404814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412 (or 1395 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 218404814 is about 14778.5254338855. The cubic root of 218404814 is about 602.2184668613.

The spelling of 218404814 in words is "two hundred eighteen million, four hundred four thousand, eight hundred fourteen".