18803839 has 2 divisors, whose sum is σ = 18803840. Its totient is φ = 18803838.

The previous prime is 18803833. The next prime is 18803849. The reversal of 18803839 is 93830881.

It is a weak prime.

It is an emirp because it is prime and its reverse (93830881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18803839 - 2¹¹ = 18801791 is a prime.

It is a super-2 number, since 2×18803839² = 707168722275842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18803833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9401919 + 9401920.

It is an arithmetic number, because the mean of its divisors is an integer number (9401920).

Almost surely, 2^18803839 is an apocalyptic number.

18803839 is a deficient number, since it is larger than the sum of its proper divisors (1).

18803839 is an equidigital number, since it uses as much as digits as its factorization.

18803839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 18803839 is about 4336.3393548015. The cubic root of 18803839 is about 265.9186769698.

The spelling of 18803839 in words is "eighteen million, eight hundred three thousand, eight hundred thirty-nine".