1808299019 has 4 divisors (see below), whose sum is σ = 1831188960. Its totient is φ = 1785409080.

The previous prime is 1808299001. The next prime is 1808299049. The reversal of 1808299019 is 9109928081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1808299019 - 2⁸ = 1808298763 is a prime.

It is a super-2 number, since 2×1808299019² = 6539890684232724722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1808299049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11444852 + ... + 11445009.

It is an arithmetic number, because the mean of its divisors is an integer number (457797240).

Almost surely, 2^1808299019 is an apocalyptic number.

1808299019 is a deficient number, since it is larger than the sum of its proper divisors (22889941).

1808299019 is an equidigital number, since it uses as much as digits as its factorization.

1808299019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22889940.

The product of its (nonzero) digits is 93312, while the sum is 47.

The square root of 1808299019 is about 42524.0992732356. The cubic root of 1808299019 is about 1218.3070262713.

The spelling of 1808299019 in words is "one billion, eight hundred eight million, two hundred ninety-nine thousand, nineteen".