18974833 has 2 divisors, whose sum is σ = 18974834. Its totient is φ = 18974832.

The previous prime is 18974827. The next prime is 18974881. The reversal of 18974833 is 33847981.

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., 11614464 + 7360369 = 3408^2 + 2713^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18974833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18974833.

It is not a weakly prime, because it can be changed into another prime (18974933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9487416 + 9487417.

It is an arithmetic number, because the mean of its divisors is an integer number (9487417).

Almost surely, 2^18974833 is an apocalyptic number.

It is an amenable number.

18974833 is a deficient number, since it is larger than the sum of its proper divisors (1).

18974833 is an equidigital number, since it uses as much as digits as its factorization.

18974833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 18974833 is about 4356.0111340537. The cubic root of 18974833 is about 266.7222958597.

The spelling of 18974833 in words is "eighteen million, nine hundred seventy-four thousand, eight hundred thirty-three".