20000019 has 8 divisors (see below), whose sum is σ = 28718032. Its totient is φ = 12307680.

The previous prime is 20000003. The next prime is 20000023. The reversal of 20000019 is 91000002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20000019 - 2⁴ = 20000003 is a prime.

It is a super-2 number, since 2×20000019² = 800001520000722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19999959 and 20000013.

It is not an unprimeable number, because it can be changed into a prime (20000059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256372 + ... + 256449.

It is an arithmetic number, because the mean of its divisors is an integer number (3589754).

Almost surely, 2^20000019 is an apocalyptic number.

20000019 is a deficient number, since it is larger than the sum of its proper divisors (8718013).

20000019 is a wasteful number, since it uses less digits than its factorization.

20000019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512837.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 20000019 is about 4472.1380792637. The cubic root of 20000019 is about 271.4418476160.

The spelling of 20000019 in words is "twenty million, nineteen", and thus it is an aban number and an uban number.