18045777 has 24 divisors (see below), whose sum is σ = 25641504. Its totient is φ = 11285824.

The previous prime is 18045773. The next prime is 18045787. The reversal of 18045777 is 77754081.

It is not a de Polignac number, because 18045777 - 2² = 18045773 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18045773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131653 + ... + 131789.

It is an arithmetic number, because the mean of its divisors is an integer number (1068396).

Almost surely, 2^18045777 is an apocalyptic number.

It is an amenable number.

18045777 is a deficient number, since it is larger than the sum of its proper divisors (7595727).

18045777 is a wasteful number, since it uses less digits than its factorization.

18045777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 39.

The square root of 18045777 is about 4248.0321326468. The cubic root of 18045777 is about 262.2961174233.

The spelling of 18045777 in words is "eighteen million, forty-five thousand, seven hundred seventy-seven".