9218718442 has 4 divisors (see below), whose sum is σ = 13828077666. Its totient is φ = 4609359220.

The previous prime is 9218718437. The next prime is 9218718473. The reversal of 9218718442 is 2448178129.

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., 5987819161 + 3230899281 = 77381^2 + 56841^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9218718392 and 9218718401.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2304679609 + ... + 2304679612.

Almost surely, 2^9218718442 is an apocalyptic number.

9218718442 is a deficient number, since it is larger than the sum of its proper divisors (4609359224).

9218718442 is a wasteful number, since it uses less digits than its factorization.

9218718442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4609359223.

The product of its digits is 258048, while the sum is 46.

The square root of 9218718442 is about 96014.1575081508. The cubic root of 9218718442 is about 2096.7992390102.

The spelling of 9218718442 in words is "nine billion, two hundred eighteen million, seven hundred eighteen thousand, four hundred forty-two".