18824129 has 2 divisors, whose sum is σ = 18824130. Its totient is φ = 18824128.

The previous prime is 18824107. The next prime is 18824137. The reversal of 18824129 is 92142881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18105025 + 719104 = 4255^2 + 848^2 .

It is a cyclic number.

It is not a de Polignac number, because 18824129 - 2⁸ = 18823873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18824149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9412064 + 9412065.

It is an arithmetic number, because the mean of its divisors is an integer number (9412065).

Almost surely, 2^18824129 is an apocalyptic number.

It is an amenable number.

18824129 is a deficient number, since it is larger than the sum of its proper divisors (1).

18824129 is an equidigital number, since it uses as much as digits as its factorization.

18824129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 35.

The square root of 18824129 is about 4338.6782549528. The cubic root of 18824129 is about 266.0142877734.

The spelling of 18824129 in words is "eighteen million, eight hundred twenty-four thousand, one hundred twenty-nine".