18130202 has 4 divisors (see below), whose sum is σ = 27195306. Its totient is φ = 9065100.

The previous prime is 18130193. The next prime is 18130213. The reversal of 18130202 is 20203181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20203181 = 719 ⋅28099.

It can be written as a sum of positive squares in only one way, i.e., 16900321 + 1229881 = 4111^2 + 1109^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4532549 + ... + 4532552.

Almost surely, 2^18130202 is an apocalyptic number.

18130202 is a deficient number, since it is larger than the sum of its proper divisors (9065104).

18130202 is an equidigital number, since it uses as much as digits as its factorization.

18130202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9065103.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 18130202 is about 4257.9574915680. The cubic root of 18130202 is about 262.7045214867.

Adding to 18130202 its reverse (20203181), we get a palindrome (38333383).

The spelling of 18130202 in words is "eighteen million, one hundred thirty thousand, two hundred two".