20043013 has 8 divisors (see below), whose sum is σ = 20421632. Its totient is φ = 19668096.

The previous prime is 20043007. The next prime is 20043053. The reversal of 20043013 is 31034002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20043013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20042984 and 20043002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043053) 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 7 ways as a sum of consecutive naturals, for example, 11506 + ... + 13132.

It is an arithmetic number, because the mean of its divisors is an integer number (2552704).

Almost surely, 2^20043013 is an apocalyptic number.

It is an amenable number.

20043013 is a deficient number, since it is larger than the sum of its proper divisors (378619).

20043013 is a wasteful number, since it uses less digits than its factorization.

20043013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20043013 is about 4476.9423717533. The cubic root of 20043013 is about 271.6362144010.

Adding to 20043013 its reverse (31034002), we get a palindrome (51077015).

The spelling of 20043013 in words is "twenty million, forty-three thousand, thirteen".