18877069 has 2 divisors, whose sum is σ = 18877070. Its totient is φ = 18877068.

The previous prime is 18877039. The next prime is 18877081. The reversal of 18877069 is 96077881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9847044 + 9030025 = 3138^2 + 3005^2 .

It is an emirp because it is prime and its reverse (96077881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18877069 - 2⁵ = 18877037 is a prime.

It is a super-2 number, since 2×18877069² = 712687468061522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18877039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9438534 + 9438535.

It is an arithmetic number, because the mean of its divisors is an integer number (9438535).

Almost surely, 2^18877069 is an apocalyptic number.

It is an amenable number.

18877069 is a deficient number, since it is larger than the sum of its proper divisors (1).

18877069 is an equidigital number, since it uses as much as digits as its factorization.

18877069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 18877069 is about 4344.7749078635. The cubic root of 18877069 is about 266.2634292711.

The spelling of 18877069 in words is "eighteen million, eight hundred seventy-seven thousand, sixty-nine".