20420042322013 has 4 divisors (see below), whose sum is σ = 20580830056960. Its totient is φ = 20259254587068.

The previous prime is 20420042322007. The next prime is 20420042322049. The reversal of 20420042322013 is 31022324002402.

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 20420042322013 - 2³⁷ = 20282603368541 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 (20420042322073) 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, 80393867283 + ... + 80393867536.

It is an arithmetic number, because the mean of its divisors is an integer number (5145207514240).

Almost surely, 2^{20420042322013} is an apocalyptic number.

It is an amenable number.

20420042322013 is a deficient number, since it is larger than the sum of its proper divisors (160787734947).

20420042322013 is a wasteful number, since it uses less digits than its factorization.

20420042322013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160787734946.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20420042322013 its reverse (31022324002402), we get a palindrome (51442366324415).

The spelling of 20420042322013 in words is "twenty trillion, four hundred twenty billion, forty-two million, three hundred twenty-two thousand, thirteen".