18020077 has 2 divisors, whose sum is σ = 18020078. Its totient is φ = 18020076.

The previous prime is 18020059. The next prime is 18020081. The reversal of 18020077 is 77002081.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15217801 + 2802276 = 3901^2 + 1674^2 .

It is a cyclic number.

It is not a de Polignac number, because 18020077 - 2¹¹ = 18018029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18020027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9010038 + 9010039.

It is an arithmetic number, because the mean of its divisors is an integer number (9010039).

Almost surely, 2^18020077 is an apocalyptic number.

It is an amenable number.

18020077 is a deficient number, since it is larger than the sum of its proper divisors (1).

18020077 is an equidigital number, since it uses as much as digits as its factorization.

18020077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 18020077 is about 4245.0061248483. The cubic root of 18020077 is about 262.1715414106.

The spelling of 18020077 in words is "eighteen million, twenty thousand, seventy-seven".