130040018 has 4 divisors (see below), whose sum is σ = 195060030. Its totient is φ = 65020008.

The previous prime is 130040017. The next prime is 130040033. The reversal of 130040018 is 810040031.

It is a happy number.

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., 103897249 + 26142769 = 10193^2 + 5113^2 .

It is a junction number, because it is equal to n+sod(n) for n = 130039978 and 130040005.

It is not an unprimeable number, because it can be changed into a prime (130040017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32510003 + ... + 32510006.

Almost surely, 2^130040018 is an apocalyptic number.

130040018 is a deficient number, since it is larger than the sum of its proper divisors (65020012).

130040018 is an equidigital number, since it uses as much as digits as its factorization.

130040018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65020011.

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

The square root of 130040018 is about 11403.5090213495. The cubic root of 130040018 is about 506.6316768504.

Adding to 130040018 its reverse (810040031), we get a palindrome (940080049).

The spelling of 130040018 in words is "one hundred thirty million, forty thousand, eighteen".