2001808019 has 2 divisors, whose sum is σ = 2001808020. Its totient is φ = 2001808018.

The previous prime is 2001808001. The next prime is 2001808031. The reversal of 2001808019 is 9108081002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001808019 is a prime.

It is a super-2 number, since 2×2001808019² = 8014470689865408722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2001807982 and 2001808000.

It is not a weakly prime, because it can be changed into another prime (2001808079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000904009 + 1000904010.

It is an arithmetic number, because the mean of its divisors is an integer number (1000904010).

Almost surely, 2^2001808019 is an apocalyptic number.

2001808019 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001808019 is an equidigital number, since it uses as much as digits as its factorization.

2001808019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 2001808019 is about 44741.5692505303. The cubic root of 2001808019 is about 1260.3005957463.

The spelling of 2001808019 in words is "two billion, one million, eight hundred eight thousand, nineteen".