18352018 has 4 divisors (see below), whose sum is σ = 27528030. Its totient is φ = 9176008.

The previous prime is 18352001. The next prime is 18352021. The reversal of 18352018 is 81025381.

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., 9690769 + 8661249 = 3113^2 + 2943^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4588003 + ... + 4588006.

Almost surely, 2^18352018 is an apocalyptic number.

18352018 is a deficient number, since it is larger than the sum of its proper divisors (9176012).

18352018 is an equidigital number, since it uses as much as digits as its factorization.

18352018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9176011.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 18352018 is about 4283.9255362343. The cubic root of 18352018 is about 263.7715444018.

Adding to 18352018 its reverse (81025381), we get a palindrome (99377399).

The spelling of 18352018 in words is "eighteen million, three hundred fifty-two thousand, eighteen".