18077 has 2 divisors, whose sum is σ = 18078. Its totient is φ = 18076.

The previous prime is 18061. The next prime is 18089. The reversal of 18077 is 77081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17956 + 121 = 134^2 + 11^2 .

It is an emirp because it is prime and its reverse (77081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18077 - 2⁴ = 18061 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a nialpdrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 18077.

It is not a weakly prime, because it can be changed into another prime (18047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9038 + 9039.

It is an arithmetic number, because the mean of its divisors is an integer number (9039).

2¹⁸⁰⁷⁷ is an apocalyptic number.

It is an amenable number.

18077 is a deficient number, since it is larger than the sum of its proper divisors (1).

18077 is an equidigital number, since it uses as much as digits as its factorization.

18077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 18077 is about 134.4507344718. The cubic root of 18077 is about 26.2447306127.

The spelling of 18077 in words is "eighteen thousand, seventy-seven".