18914933 has 2 divisors, whose sum is σ = 18914934. Its totient is φ = 18914932.

The previous prime is 18914927. The next prime is 18914963. The reversal of 18914933 is 33941981.

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., 11035684 + 7879249 = 3322^2 + 2807^2 .

It is an emirp because it is prime and its reverse (33941981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18914933 - 2⁸ = 18914677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18914923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9457466 + 9457467.

It is an arithmetic number, because the mean of its divisors is an integer number (9457467).

Almost surely, 2^18914933 is an apocalyptic number.

It is an amenable number.

18914933 is a deficient number, since it is larger than the sum of its proper divisors (1).

18914933 is an equidigital number, since it uses as much as digits as its factorization.

18914933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 18914933 is about 4349.1301429136. The cubic root of 18914933 is about 266.4413358665.

The spelling of 18914933 in words is "eighteen million, nine hundred fourteen thousand, nine hundred thirty-three".