18889822225 has 12 divisors (see below), whose sum is σ = 23431985500. Its totient is φ = 15106305600.

The previous prime is 18889822201. The next prime is 18889822247. The reversal of 18889822225 is 52222898881.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4412679184 + 14477143041 = 66428^2 + 120321^2 .

It is not a de Polignac number, because 18889822225 - 2¹¹ = 18889820177 is a prime.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68706 + ... + 206155.

Almost surely, 2^18889822225 is an apocalyptic number.

It is an amenable number.

18889822225 is a deficient number, since it is larger than the sum of its proper divisors (4542163275).

18889822225 is a wasteful number, since it uses less digits than its factorization.

18889822225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277620 (or 277615 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 55.

The spelling of 18889822225 in words is "eighteen billion, eight hundred eighty-nine million, eight hundred twenty-two thousand, two hundred twenty-five".