18353418439 has 4 divisors (see below), whose sum is σ = 18426539880. Its totient is φ = 18280297000.

The previous prime is 18353418427. The next prime is 18353418463. The reversal of 18353418439 is 93481435381.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18353418439 - 2⁵ = 18353418407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18353418392 and 18353418401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18353418539) 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, 36560344 + ... + 36560845.

It is an arithmetic number, because the mean of its divisors is an integer number (4606634970).

Almost surely, 2^18353418439 is an apocalyptic number.

18353418439 is a deficient number, since it is larger than the sum of its proper divisors (73121441).

18353418439 is an equidigital number, since it uses as much as digits as its factorization.

18353418439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73121440.

The product of its digits is 1244160, while the sum is 49.

The spelling of 18353418439 in words is "eighteen billion, three hundred fifty-three million, four hundred eighteen thousand, four hundred thirty-nine".