18725033 has 2 divisors, whose sum is σ = 18725034. Its totient is φ = 18725032.

The previous prime is 18725029. The next prime is 18725099. The reversal of 18725033 is 33052781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12902464 + 5822569 = 3592^2 + 2413^2 .

It is an emirp because it is prime and its reverse (33052781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18725033 - 2² = 18725029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18724987 and 18725005.

It is not a weakly prime, because it can be changed into another prime (18721033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9362516 + 9362517.

It is an arithmetic number, because the mean of its divisors is an integer number (9362517).

Almost surely, 2^18725033 is an apocalyptic number.

It is an amenable number.

18725033 is a deficient number, since it is larger than the sum of its proper divisors (1).

18725033 is an equidigital number, since it uses as much as digits as its factorization.

18725033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 18725033 is about 4327.2431177367. The cubic root of 18725033 is about 265.5466726006.

The spelling of 18725033 in words is "eighteen million, seven hundred twenty-five thousand, thirty-three".