20130300021 has 16 divisors (see below), whose sum is σ = 28911599360. Its totient is φ = 12385068480.

The previous prime is 20130300019. The next prime is 20130300023. The reversal of 20130300021 is 12000303102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20130300019) and next prime (20130300023).

It is not a de Polignac number, because 20130300021 - 2¹ = 20130300019 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 (20130300023) 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 15 ways as a sum of consecutive naturals, for example, 122835 + ... + 235263.

It is an arithmetic number, because the mean of its divisors is an integer number (1806974960).

Almost surely, 2^20130300021 is an apocalyptic number.

It is an amenable number.

20130300021 is a deficient number, since it is larger than the sum of its proper divisors (8781299339).

20130300021 is a wasteful number, since it uses less digits than its factorization.

20130300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117036.

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

Adding to 20130300021 its reverse (12000303102), we get a palindrome (32130603123).

The spelling of 20130300021 in words is "twenty billion, one hundred thirty million, three hundred thousand, twenty-one".