218042836 has 12 divisors (see below), whose sum is σ = 416263680. Its totient is φ = 99110360.

The previous prime is 218042831. The next prime is 218042843. The reversal of 218042836 is 638240812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218042831) 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, 2477716 + ... + 2477803.

It is an arithmetic number, because the mean of its divisors is an integer number (34688640).

Almost surely, 2^218042836 is an apocalyptic number.

It is an amenable number.

218042836 is a deficient number, since it is larger than the sum of its proper divisors (198220844).

218042836 is a wasteful number, since it uses less digits than its factorization.

218042836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4955534 (or 4955532 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 218042836 is about 14766.2735989822. The cubic root of 218042836 is about 601.8855829026.

The spelling of 218042836 in words is "two hundred eighteen million, forty-two thousand, eight hundred thirty-six".