20404043013 has 8 divisors (see below), whose sum is σ = 27213074848. Its totient is φ = 13598853264.

The previous prime is 20404042999. The next prime is 20404043021. The reversal of 20404043013 is 31034040402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20404043013 - 2²² = 20399848709 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 (20404043083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948106 + ... + 969387.

It is an arithmetic number, because the mean of its divisors is an integer number (3401634356).

Almost surely, 2^20404043013 is an apocalyptic number.

It is an amenable number.

20404043013 is a deficient number, since it is larger than the sum of its proper divisors (6809031835).

20404043013 is a wasteful number, since it uses less digits than its factorization.

20404043013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921043.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20404043013 its reverse (31034040402), we get a palindrome (51438083415).

The spelling of 20404043013 in words is "twenty billion, four hundred four million, forty-three thousand, thirteen".