18425554222 has 4 divisors (see below), whose sum is σ = 27638331336. Its totient is φ = 9212777110.

The previous prime is 18425554183. The next prime is 18425554229. The reversal of 18425554222 is 22245552481.

It is a happy number.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18425554229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4606388554 + ... + 4606388557.

It is an arithmetic number, because the mean of its divisors is an integer number (6909582834).

Almost surely, 2^18425554222 is an apocalyptic number.

18425554222 is a deficient number, since it is larger than the sum of its proper divisors (9212777114).

18425554222 is an equidigital number, since it uses as much as digits as its factorization.

18425554222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9212777113.

The product of its digits is 256000, while the sum is 40.

The spelling of 18425554222 in words is "eighteen billion, four hundred twenty-five million, five hundred fifty-four thousand, two hundred twenty-two".