18868433 has 2 divisors, whose sum is σ = 18868434. Its totient is φ = 18868432.

The previous prime is 18868411. The next prime is 18868469. The reversal of 18868433 is 33486881.

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., 10705984 + 8162449 = 3272^2 + 2857^2 .

It is a cyclic number.

It is not a de Polignac number, because 18868433 - 2⁸ = 18868177 is a prime.

It is not a weakly prime, because it can be changed into another prime (18868133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9434216 + 9434217.

It is an arithmetic number, because the mean of its divisors is an integer number (9434217).

Almost surely, 2^18868433 is an apocalyptic number.

It is an amenable number.

18868433 is a deficient number, since it is larger than the sum of its proper divisors (1).

18868433 is an equidigital number, since it uses as much as digits as its factorization.

18868433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 41.

The square root of 18868433 is about 4343.7809567242. The cubic root of 18868433 is about 266.2228191227. Note that the first 3 decimals are identical.

The spelling of 18868433 in words is "eighteen million, eight hundred sixty-eight thousand, four hundred thirty-three".