20040335013 has 4 divisors (see below), whose sum is σ = 26720446688. Its totient is φ = 13360223340.

The previous prime is 20040335009. The next prime is 20040335027. The reversal of 20040335013 is 31053304002.

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 not a de Polignac number, because 20040335013 - 2² = 20040335009 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 (20040337013) 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, 3340055833 + ... + 3340055838.

It is an arithmetic number, because the mean of its divisors is an integer number (6680111672).

Almost surely, 2^20040335013 is an apocalyptic number.

It is an amenable number.

20040335013 is a deficient number, since it is larger than the sum of its proper divisors (6680111675).

20040335013 is an equidigital number, since it uses as much as digits as its factorization.

20040335013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6680111674.

The product of its (nonzero) digits is 1080, while the sum is 21.

Adding to 20040335013 its reverse (31053304002), we get a palindrome (51093639015).

The spelling of 20040335013 in words is "twenty billion, forty million, three hundred thirty-five thousand, thirteen".