20003130013021 has 4 divisors (see below), whose sum is σ = 20118755042172. Its totient is φ = 19887504983872.

The previous prime is 20003130013003. The next prime is 20003130013057. The reversal of 20003130013021 is 12031003130002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19487015648100 + 516114364921 = 4414410^2 + 718411^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003130013021 - 2⁷ = 20003130012893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20003130012986 and 20003130013004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003130013421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57812514316 + ... + 57812514661.

It is an arithmetic number, because the mean of its divisors is an integer number (5029688760543).

Almost surely, 2^{20003130013021} is an apocalyptic number.

It is an amenable number.

20003130013021 is a deficient number, since it is larger than the sum of its proper divisors (115625029151).

20003130013021 is a wasteful number, since it uses less digits than its factorization.

20003130013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115625029150.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20003130013021 its reverse (12031003130002), we get a palindrome (32034133143023).

The spelling of 20003130013021 in words is "twenty trillion, three billion, one hundred thirty million, thirteen thousand, twenty-one".