18625434313 has 4 divisors (see below), whose sum is σ = 18721939348. Its totient is φ = 18528929280.

The previous prime is 18625434283. The next prime is 18625434337. The reversal of 18625434313 is 31343452681.

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 2 ways, for example, as 9500790784 + 9124643529 = 97472^2 + 95523^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18625434313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18625431313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48252228 + ... + 48252613.

It is an arithmetic number, because the mean of its divisors is an integer number (4680484837).

Almost surely, 2^18625434313 is an apocalyptic number.

It is an amenable number.

18625434313 is a deficient number, since it is larger than the sum of its proper divisors (96505035).

18625434313 is an equidigital number, since it uses as much as digits as its factorization.

18625434313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96505034.

The product of its digits is 207360, while the sum is 40.

Adding to 18625434313 its reverse (31343452681), we get a palindrome (49968886994).

The spelling of 18625434313 in words is "eighteen billion, six hundred twenty-five million, four hundred thirty-four thousand, three hundred thirteen".