16801819 has 2 divisors, whose sum is σ = 16801820. Its totient is φ = 16801818.

The previous prime is 16801793. The next prime is 16801849. The reversal of 16801819 is 91810861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16801819 - 2⁵ = 16801787 is a prime.

It is a super-2 number, since 2×16801819² = 564602243417522, which contains 22 as substring.

It is equal to p_1079377 and since 16801819 and 1079377 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (16801849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8400909 + 8400910.

It is an arithmetic number, because the mean of its divisors is an integer number (8400910).

Almost surely, 2^16801819 is an apocalyptic number.

16801819 is a deficient number, since it is larger than the sum of its proper divisors (1).

16801819 is an equidigital number, since it uses as much as digits as its factorization.

16801819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 34.

The square root of 16801819 is about 4099.0021956569. The cubic root of 16801819 is about 256.1250762095.

The spelling of 16801819 in words is "sixteen million, eight hundred one thousand, eight hundred nineteen".