18683537 has 2 divisors, whose sum is σ = 18683538. Its totient is φ = 18683536.

The previous prime is 18683519. The next prime is 18683551. The reversal of 18683537 is 73538681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16072081 + 2611456 = 4009^2 + 1616^2 .

It is a cyclic number.

It is not a de Polignac number, because 18683537 - 2²⁴ = 1906321 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18683494 and 18683503.

It is not a weakly prime, because it can be changed into another prime (18683237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9341768 + 9341769.

It is an arithmetic number, because the mean of its divisors is an integer number (9341769).

Almost surely, 2^18683537 is an apocalyptic number.

It is an amenable number.

18683537 is a deficient number, since it is larger than the sum of its proper divisors (1).

18683537 is an equidigital number, since it uses as much as digits as its factorization.

18683537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 18683537 is about 4322.4457197286. The cubic root of 18683537 is about 265.3503707751.

The spelling of 18683537 in words is "eighteen million, six hundred eighty-three thousand, five hundred thirty-seven".