18377177228 has 12 divisors (see below), whose sum is σ = 32162915400. Its totient is φ = 9187772832.

The previous prime is 18377177227. The next prime is 18377177257. The reversal of 18377177228 is 82277177381.

It is a self number, because there is not a number n which added to its sum of digits gives 18377177228.

It is not an unprimeable number, because it can be changed into a prime (18377177227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151778 + ... + 244521.

It is an arithmetic number, because the mean of its divisors is an integer number (2680242950).

Almost surely, 2^18377177228 is an apocalyptic number.

It is an amenable number.

18377177228 is a deficient number, since it is larger than the sum of its proper divisors (13785738172).

18377177228 is a wasteful number, since it uses less digits than its factorization.

18377177228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407896 (or 407894 counting only the distinct ones).

The product of its digits is 1843968, while the sum is 53.

The spelling of 18377177228 in words is "eighteen billion, three hundred seventy-seven million, one hundred seventy-seven thousand, two hundred twenty-eight".