18036169 has 2 divisors, whose sum is σ = 18036170. Its totient is φ = 18036168.

The previous prime is 18036157. The next prime is 18036229. The reversal of 18036169 is 96163081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17330569 + 705600 = 4163^2 + 840^2 .

It is a cyclic number.

It is not a de Polignac number, because 18036169 - 2¹⁹ = 17511881 is a prime.

It is a super-2 number, since 2×18036169² = 650606784393122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18036119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9018084 + 9018085.

It is an arithmetic number, because the mean of its divisors is an integer number (9018085).

Almost surely, 2^18036169 is an apocalyptic number.

It is an amenable number.

18036169 is a deficient number, since it is larger than the sum of its proper divisors (1).

18036169 is an equidigital number, since it uses as much as digits as its factorization.

18036169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 18036169 is about 4246.9011055121. The cubic root of 18036169 is about 262.2495582663.

The spelling of 18036169 in words is "eighteen million, thirty-six thousand, one hundred sixty-nine".