18545875459 has 4 divisors (see below), whose sum is σ = 18549138816. Its totient is φ = 18542612104.

The previous prime is 18545875441. The next prime is 18545875493. The reversal of 18545875459 is 95457854581.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95457854581 = 2609 ⋅36587909.

It is a cyclic number.

It is not a de Polignac number, because 18545875459 - 2⁵ = 18545875427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18545875397 and 18545875406.

It is not an unprimeable number, because it can be changed into a prime (18545875409) 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, 1623139 + ... + 1634524.

It is an arithmetic number, because the mean of its divisors is an integer number (4637284704).

Almost surely, 2^18545875459 is an apocalyptic number.

18545875459 is a deficient number, since it is larger than the sum of its proper divisors (3263357).

18545875459 is an equidigital number, since it uses as much as digits as its factorization.

18545875459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3263356.

The product of its digits is 40320000, while the sum is 61.

The spelling of 18545875459 in words is "eighteen billion, five hundred forty-five million, eight hundred seventy-five thousand, four hundred fifty-nine".