18204077 has 2 divisors, whose sum is σ = 18204078. Its totient is φ = 18204076.

The previous prime is 18204029. The next prime is 18204079. The reversal of 18204077 is 77040281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18028516 + 175561 = 4246^2 + 419^2 .

It is a cyclic number.

It is not a de Polignac number, because 18204077 - 2²² = 14009773 is a prime.

Together with 18204079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18204079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9102038 + 9102039.

It is an arithmetic number, because the mean of its divisors is an integer number (9102039).

Almost surely, 2^18204077 is an apocalyptic number.

It is an amenable number.

18204077 is a deficient number, since it is larger than the sum of its proper divisors (1).

18204077 is an equidigital number, since it uses as much as digits as its factorization.

18204077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 18204077 is about 4266.6236065535. The cubic root of 18204077 is about 263.0608513361.

The spelling of 18204077 in words is "eighteen million, two hundred four thousand, seventy-seven".