18336377 has 2 divisors, whose sum is σ = 18336378. Its totient is φ = 18336376.

The previous prime is 18336371. The next prime is 18336391. The reversal of 18336377 is 77363381.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17106496 + 1229881 = 4136^2 + 1109^2 .

It is a cyclic number.

It is not a de Polignac number, because 18336377 - 2¹⁴ = 18319993 is a prime.

It is a super-2 number, since 2×18336377² = 672445442972258, which contains 22 as substring.

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 18336377.

It is not a weakly prime, because it can be changed into another prime (18336371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9168188 + 9168189.

It is an arithmetic number, because the mean of its divisors is an integer number (9168189).

Almost surely, 2^18336377 is an apocalyptic number.

It is an amenable number.

18336377 is a deficient number, since it is larger than the sum of its proper divisors (1).

18336377 is an equidigital number, since it uses as much as digits as its factorization.

18336377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 38.

The square root of 18336377 is about 4282.0996018309. The cubic root of 18336377 is about 263.6965876433.

The spelling of 18336377 in words is "eighteen million, three hundred thirty-six thousand, three hundred seventy-seven".