18141857 has 2 divisors, whose sum is σ = 18141858. Its totient is φ = 18141856.

The previous prime is 18141841. The next prime is 18141869. The reversal of 18141857 is 75814181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18011536 + 130321 = 4244^2 + 361^2 .

It is a cyclic number.

It is not a de Polignac number, because 18141857 - 2⁴ = 18141841 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18131857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9070928 + 9070929.

It is an arithmetic number, because the mean of its divisors is an integer number (9070929).

Almost surely, 2^18141857 is an apocalyptic number.

It is an amenable number.

18141857 is a deficient number, since it is larger than the sum of its proper divisors (1).

18141857 is an equidigital number, since it uses as much as digits as its factorization.

18141857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 35.

The square root of 18141857 is about 4259.3258856303. The cubic root of 18141857 is about 262.7608026271.

The spelling of 18141857 in words is "eighteen million, one hundred forty-one thousand, eight hundred fifty-seven".