18855574459 has 4 divisors (see below), whose sum is σ = 18856771920. Its totient is φ = 18854377000.

The previous prime is 18855574457. The next prime is 18855574469. The reversal of 18855574459 is 95447555881.

It is a happy number.

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 18855574459 - 2¹ = 18855574457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18855574397 and 18855574406.

It is not an unprimeable number, because it can be changed into a prime (18855574453) 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, 574792 + ... + 606709.

It is an arithmetic number, because the mean of its divisors is an integer number (4714192980).

Almost surely, 2^18855574459 is an apocalyptic number.

18855574459 is a deficient number, since it is larger than the sum of its proper divisors (1197461).

18855574459 is a wasteful number, since it uses less digits than its factorization.

18855574459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197460.

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

The spelling of 18855574459 in words is "eighteen billion, eight hundred fifty-five million, five hundred seventy-four thousand, four hundred fifty-nine".