18130706434 has 4 divisors (see below), whose sum is σ = 27196059654. Its totient is φ = 9065353216.

The previous prime is 18130706423. The next prime is 18130706437. The reversal of 18130706434 is 43460703181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43460703181 = 7 ⋅6208671883.

It can be written as a sum of positive squares in only one way, i.e., 17754230025 + 376476409 = 133245^2 + 19403^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18130706393 and 18130706402.

It is not an unprimeable number, because it can be changed into a prime (18130706437) by changing a digit.

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, 4532676607 + ... + 4532676610.

Almost surely, 2^18130706434 is an apocalyptic number.

18130706434 is a deficient number, since it is larger than the sum of its proper divisors (9065353220).

18130706434 is an equidigital number, since it uses as much as digits as its factorization.

18130706434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9065353219.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 18130706434 in words is "eighteen billion, one hundred thirty million, seven hundred six thousand, four hundred thirty-four".