20004819 has 4 divisors (see below), whose sum is σ = 26673096. Its totient is φ = 13336544.

The previous prime is 20004811. The next prime is 20004821. The reversal of 20004819 is 91840002.

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 20004819 - 2³ = 20004811 is a prime.

It is a super-2 number, since 2×20004819² = 800385566445522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20004811) 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, 3334134 + ... + 3334139.

It is an arithmetic number, because the mean of its divisors is an integer number (6668274).

Almost surely, 2^20004819 is an apocalyptic number.

20004819 is a deficient number, since it is larger than the sum of its proper divisors (6668277).

20004819 is an equidigital number, since it uses as much as digits as its factorization.

20004819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6668276.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 20004819 is about 4472.6747031279. The cubic root of 20004819 is about 271.4635612062.

The spelling of 20004819 in words is "twenty million, four thousand, eight hundred nineteen".