99918218 has 4 divisors (see below), whose sum is σ = 149877330. Its totient is φ = 49959108.

The previous prime is 99918209. The next prime is 99918257. The reversal of 99918218 is 81281999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 85803169 + 14115049 = 9263^2 + 3757^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24979553 + ... + 24979556.

Almost surely, 2^99918218 is an apocalyptic number.

99918218 is a deficient number, since it is larger than the sum of its proper divisors (49959112).

99918218 is a wasteful number, since it uses less digits than its factorization.

99918218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49959111.

The product of its digits is 93312, while the sum is 47.

The square root of 99918218 is about 9995.9100636210. The cubic root of 99918218 is about 464.0323160459.

The spelling of 99918218 in words is "ninety-nine million, nine hundred eighteen thousand, two hundred eighteen".