20424013013 has 4 divisors (see below), whose sum is σ = 20431260960. Its totient is φ = 20416765068.

The previous prime is 20424013009. The next prime is 20424013039. The reversal of 20424013013 is 31031042402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20424013013 - 2² = 20424013009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424013003) 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, 3619745 + ... + 3625382.

It is an arithmetic number, because the mean of its divisors is an integer number (5107815240).

Almost surely, 2^20424013013 is an apocalyptic number.

It is an amenable number.

20424013013 is a deficient number, since it is larger than the sum of its proper divisors (7247947).

20424013013 is an equidigital number, since it uses as much as digits as its factorization.

20424013013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7247946.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20424013013 its reverse (31031042402), we get a palindrome (51455055415).

The spelling of 20424013013 in words is "twenty billion, four hundred twenty-four million, thirteen thousand, thirteen".