18875184489 has 40 divisors (see below), whose sum is σ = 33263825408. Its totient is φ = 10437880320.

The previous prime is 18875184469. The next prime is 18875184491. The reversal of 18875184489 is 98448157881.

18875184489 is a `hidden beast` number, since 1 + 8 + 8 + 75 + 1 + 84 + 489 = 666.

It is not a de Polignac number, because 18875184489 - 2¹¹ = 18875182441 is a prime.

It is a super-2 number, since 2×18875184489² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18875184469) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 519352 + ... + 554505.

Almost surely, 2^18875184489 is an apocalyptic number.

It is an amenable number.

18875184489 is a deficient number, since it is larger than the sum of its proper divisors (14388640919).

18875184489 is a wasteful number, since it uses less digits than its factorization.

18875184489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073907 (or 1073898 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 63.

The spelling of 18875184489 in words is "eighteen billion, eight hundred seventy-five million, one hundred eighty-four thousand, four hundred eighty-nine".