20203021213013 has 4 divisors (see below), whose sum is σ = 20899677116940. Its totient is φ = 19506365309088.

The previous prime is 20203021212931. The next prime is 20203021213033. The reversal of 20203021213013 is 31031212030202.

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 3380571308689 + 16822449904324 = 1838633^2 + 4101518^2 .

It is a cyclic number.

It is not a de Polignac number, because 20203021213013 - 2³⁸ = 19928143306069 is a prime.

It is a super-2 number, since 2×20203021213013² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203021213033) 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, 348327951920 + ... + 348327951977.

It is an arithmetic number, because the mean of its divisors is an integer number (5224919279235).

Almost surely, 2^{20203021213013} is an apocalyptic number.

It is an amenable number.

20203021213013 is a deficient number, since it is larger than the sum of its proper divisors (696655903927).

20203021213013 is an equidigital number, since it uses as much as digits as its factorization.

20203021213013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696655903926.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20203021213013 its reverse (31031212030202), we get a palindrome (51234233243215).

The spelling of 20203021213013 in words is "twenty trillion, two hundred three billion, twenty-one million, two hundred thirteen thousand, thirteen".