18872412833 has 4 divisors (see below), whose sum is σ = 19228496148. Its totient is φ = 18516329520.

The previous prime is 18872412821. The next prime is 18872412851. The reversal of 18872412833 is 33821427881.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17335145569 + 1537267264 = 131663^2 + 39208^2 .

It is a cyclic number.

It is not a de Polignac number, because 18872412833 - 2⁸ = 18872412577 is a prime.

It is a super-2 number, since 2×18872412833² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18872418833) 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, 178041578 + ... + 178041683.

It is an arithmetic number, because the mean of its divisors is an integer number (4807124037).

Almost surely, 2^18872412833 is an apocalyptic number.

It is an amenable number.

18872412833 is a deficient number, since it is larger than the sum of its proper divisors (356083315).

18872412833 is an equidigital number, since it uses as much as digits as its factorization.

18872412833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356083314.

The product of its digits is 516096, while the sum is 47.

The spelling of 18872412833 in words is "eighteen billion, eight hundred seventy-two million, four hundred twelve thousand, eight hundred thirty-three".