18142877 has 2 divisors, whose sum is σ = 18142878. Its totient is φ = 18142876.

The previous prime is 18142867. The next prime is 18142879. The reversal of 18142877 is 77824181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16736281 + 1406596 = 4091^2 + 1186^2 .

It is a cyclic number.

It is not a de Polignac number, because 18142877 - 2²² = 13948573 is a prime.

Together with 18142879, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18142877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18142879) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9071438 + 9071439.

It is an arithmetic number, because the mean of its divisors is an integer number (9071439).

Almost surely, 2^18142877 is an apocalyptic number.

It is an amenable number.

18142877 is a deficient number, since it is larger than the sum of its proper divisors (1).

18142877 is an equidigital number, since it uses as much as digits as its factorization.

18142877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25088, while the sum is 38.

The square root of 18142877 is about 4259.4456212047. The cubic root of 18142877 is about 262.7657269851.

The spelling of 18142877 in words is "eighteen million, one hundred forty-two thousand, eight hundred seventy-seven".