18028877 has 2 divisors, whose sum is σ = 18028878. Its totient is φ = 18028876.

The previous prime is 18028847. The next prime is 18028897. The reversal of 18028877 is 77882081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18028516 + 361 = 4246^2 + 19^2 .

It is a cyclic number.

It is not a de Polignac number, because 18028877 - 2¹⁰ = 18027853 is a prime.

It is a super-2 number, since 2×18028877² = 650080811762258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18028837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9014438 + 9014439.

It is an arithmetic number, because the mean of its divisors is an integer number (9014439).

Almost surely, 2^18028877 is an apocalyptic number.

It is an amenable number.

18028877 is a deficient number, since it is larger than the sum of its proper divisors (1).

18028877 is an equidigital number, since it uses as much as digits as its factorization.

18028877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50176, while the sum is 41.

The square root of 18028877 is about 4246.0425103854. The cubic root of 18028877 is about 262.2142111156.

The spelling of 18028877 in words is "eighteen million, twenty-eight thousand, eight hundred seventy-seven".