18423098459 has 4 divisors (see below), whose sum is σ = 19392735240. Its totient is φ = 17453461680.

The previous prime is 18423098431. The next prime is 18423098461. The reversal of 18423098459 is 95489032481.

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 18423098459 - 2¹² = 18423094363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18423098459.

It is not an unprimeable number, because it can be changed into a prime (18423098429) 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, 484818362 + ... + 484818399.

It is an arithmetic number, because the mean of its divisors is an integer number (4848183810).

Almost surely, 2^18423098459 is an apocalyptic number.

18423098459 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18423098459 is a deficient number, since it is larger than the sum of its proper divisors (969636781).

18423098459 is an equidigital number, since it uses as much as digits as its factorization.

18423098459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969636780.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 18423098459 in words is "eighteen billion, four hundred twenty-three million, ninety-eight thousand, four hundred fifty-nine".