20420010013 has 4 divisors (see below), whose sum is σ = 21990780028. Its totient is φ = 18849240000.

The previous prime is 20420010001. The next prime is 20420010041. The reversal of 20420010013 is 31001002402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1814504409 + 18605505604 = 42597^2 + 136402^2 .

It is a cyclic number.

It is not a de Polignac number, because 20420010013 - 2¹³ = 20420001821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 1570770001 = 20420010013 / (2 + 0 + 4 + 2 + 0 + 0 + 1 + 0 + 0 + 1 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20420009975 and 20420010002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420011013) 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 3 ways as a sum of consecutive naturals, for example, 785384988 + ... + 785385013.

It is an arithmetic number, because the mean of its divisors is an integer number (5497695007).

Almost surely, 2^20420010013 is an apocalyptic number.

It is an amenable number.

20420010013 is a deficient number, since it is larger than the sum of its proper divisors (1570770015).

20420010013 is a wasteful number, since it uses less digits than its factorization.

20420010013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570770014.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20420010013 its reverse (31001002402), we get a palindrome (51421012415).

The spelling of 20420010013 in words is "twenty billion, four hundred twenty million, ten thousand, thirteen".