18326129 has 2 divisors, whose sum is σ = 18326130. Its totient is φ = 18326128.

The previous prime is 18326123. The next prime is 18326159. The reversal of 18326129 is 92162381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18258529 + 67600 = 4273^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 18326129 - 2¹² = 18322033 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18326095 and 18326104.

It is not a weakly prime, because it can be changed into another prime (18326123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9163064 + 9163065.

It is an arithmetic number, because the mean of its divisors is an integer number (9163065).

Almost surely, 2^18326129 is an apocalyptic number.

It is an amenable number.

18326129 is a deficient number, since it is larger than the sum of its proper divisors (1).

18326129 is an equidigital number, since it uses as much as digits as its factorization.

18326129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 18326129 is about 4280.9028253395. The cubic root of 18326129 is about 263.6474527783.

The spelling of 18326129 in words is "eighteen million, three hundred twenty-six thousand, one hundred twenty-nine".