18872278825 has 6 divisors (see below), whose sum is σ = 23401625774. Its totient is φ = 15097823040.

The previous prime is 18872278811. The next prime is 18872278871. The reversal of 18872278825 is 52887227881.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 303038464 + 18569240361 = 17408^2 + 136269^2 .

It is not a de Polignac number, because 18872278825 - 2¹¹ = 18872276777 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 18872278825.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 377445552 + ... + 377445601.

Almost surely, 2^18872278825 is an apocalyptic number.

It is an amenable number.

18872278825 is a deficient number, since it is larger than the sum of its proper divisors (4529346949).

18872278825 is an equidigital number, since it uses as much as digits as its factorization.

18872278825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754891163 (or 754891158 counting only the distinct ones).

The product of its digits is 8028160, while the sum is 58.

The spelling of 18872278825 in words is "eighteen billion, eight hundred seventy-two million, two hundred seventy-eight thousand, eight hundred twenty-five".