20424404019 has 4 divisors (see below), whose sum is σ = 27232538696. Its totient is φ = 13616269344.

The previous prime is 20424403969. The next prime is 20424404029. The reversal of 20424404019 is 91040442402.

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

It is not a de Polignac number, because 20424404019 - 2¹⁶ = 20424338483 is a prime.

It is a super-2 number, since 2×20424404019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20424404029) 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, 3404067334 + ... + 3404067339.

It is an arithmetic number, because the mean of its divisors is an integer number (6808134674).

Almost surely, 2^20424404019 is an apocalyptic number.

20424404019 is a deficient number, since it is larger than the sum of its proper divisors (6808134677).

20424404019 is an equidigital number, since it uses as much as digits as its factorization.

20424404019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6808134676.

The product of its (nonzero) digits is 9216, while the sum is 30.

The spelling of 20424404019 in words is "twenty billion, four hundred twenty-four million, four hundred four thousand, nineteen".