18418522 has 4 divisors (see below), whose sum is σ = 27627786. Its totient is φ = 9209260.

The previous prime is 18418487. The next prime is 18418537. The reversal of 18418522 is 22581481.

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., 17313921 + 1104601 = 4161^2 + 1051^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4604629 + ... + 4604632.

Almost surely, 2^18418522 is an apocalyptic number.

18418522 is a deficient number, since it is larger than the sum of its proper divisors (9209264).

18418522 is an equidigital number, since it uses as much as digits as its factorization.

18418522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9209263.

The product of its digits is 5120, while the sum is 31.

The square root of 18418522 is about 4291.6805566118. The cubic root of 18418522 is about 264.0897785411.

The spelling of 18418522 in words is "eighteen million, four hundred eighteen thousand, five hundred twenty-two".