18885337 has 2 divisors, whose sum is σ = 18885338. Its totient is φ = 18885336.

The previous prime is 18885329. The next prime is 18885367. The reversal of 18885337 is 73358881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10010896 + 8874441 = 3164^2 + 2979^2 .

It is a cyclic number.

It is not a de Polignac number, because 18885337 - 2³ = 18885329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18885293 and 18885302.

It is not a weakly prime, because it can be changed into another prime (18885367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9442668 + 9442669.

It is an arithmetic number, because the mean of its divisors is an integer number (9442669).

Almost surely, 2^18885337 is an apocalyptic number.

It is an amenable number.

18885337 is a deficient number, since it is larger than the sum of its proper divisors (1).

18885337 is an equidigital number, since it uses as much as digits as its factorization.

18885337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 43.

The square root of 18885337 is about 4345.7262914270. The cubic root of 18885337 is about 266.3022973232.

It can be divided in two parts, 1888 and 5337, that added together give a square (7225 = 85²).

The spelling of 18885337 in words is "eighteen million, eight hundred eighty-five thousand, three hundred thirty-seven".