20013030021 has 8 divisors (see below), whose sum is σ = 26702185984. Its totient is φ = 13332947040.

The previous prime is 20013029983. The next prime is 20013030031. The reversal of 20013030021 is 12003031002.

It is a happy number.

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

It is not a de Polignac number, because 20013030021 - 2¹⁵ = 20012997253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20013029979 and 20013030006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013030031) 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 7 ways as a sum of consecutive naturals, for example, 2263096 + ... + 2271921.

It is an arithmetic number, because the mean of its divisors is an integer number (3337773248).

Almost surely, 2^20013030021 is an apocalyptic number.

It is an amenable number.

20013030021 is a deficient number, since it is larger than the sum of its proper divisors (6689155963).

20013030021 is a wasteful number, since it uses less digits than its factorization.

20013030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536491.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 20013030021 its reverse (12003031002), we get a palindrome (32016061023).

The spelling of 20013030021 in words is "twenty billion, thirteen million, thirty thousand, twenty-one".