20042021013 has 24 divisors (see below), whose sum is σ = 31746989952. Its totient is φ = 11208907584.

The previous prime is 20042021011. The next prime is 20042021023. The reversal of 20042021013 is 31012024002.

It is not a de Polignac number, because 20042021013 - 2¹ = 20042021011 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20042020983 and 20042021001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20042021011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1443520 + ... + 1457337.

It is an arithmetic number, because the mean of its divisors is an integer number (1322791248).

Almost surely, 2^20042021013 is an apocalyptic number.

It is an amenable number.

20042021013 is a deficient number, since it is larger than the sum of its proper divisors (11704968939).

20042021013 is a wasteful number, since it uses less digits than its factorization.

20042021013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900921 (or 2900914 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20042021013 its reverse (31012024002), we get a palindrome (51054045015).

The spelling of 20042021013 in words is "twenty billion, forty-two million, twenty-one thousand, thirteen".