18936803 has 2 divisors, whose sum is σ = 18936804. Its totient is φ = 18936802.

The previous prime is 18936791. The next prime is 18936811. The reversal of 18936803 is 30863981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18936803 - 2¹⁰ = 18935779 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18936893) 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, 9468401 + 9468402.

It is an arithmetic number, because the mean of its divisors is an integer number (9468402).

Almost surely, 2^18936803 is an apocalyptic number.

18936803 is a deficient number, since it is larger than the sum of its proper divisors (1).

18936803 is an equidigital number, since it uses as much as digits as its factorization.

18936803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 18936803 is about 4351.6437124379. The cubic root of 18936803 is about 266.5439854088.

The spelling of 18936803 in words is "eighteen million, nine hundred thirty-six thousand, eight hundred three".