18940333 has 2 divisors, whose sum is σ = 18940334. Its totient is φ = 18940332.

The previous prime is 18940309. The next prime is 18940343. The reversal of 18940333 is 33304981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18688329 + 252004 = 4323^2 + 502^2 .

It is a cyclic number.

It is not a de Polignac number, because 18940333 - 2¹³ = 18932141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18940295 and 18940304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18940343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9470166 + 9470167.

It is an arithmetic number, because the mean of its divisors is an integer number (9470167).

Almost surely, 2^18940333 is an apocalyptic number.

It is an amenable number.

18940333 is a deficient number, since it is larger than the sum of its proper divisors (1).

18940333 is an equidigital number, since it uses as much as digits as its factorization.

18940333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 18940333 is about 4352.0492874047. The cubic root of 18940333 is about 266.5605464903.

The spelling of 18940333 in words is "eighteen million, nine hundred forty thousand, three hundred thirty-three".