20203132021 has 2 divisors, whose sum is σ = 20203132022. Its totient is φ = 20203132020.

The previous prime is 20203131983. The next prime is 20203132073. The reversal of 20203132021 is 12023130202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12805411921 + 7397720100 = 113161^2 + 86010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20203132021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20203131986 and 20203132004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20203132921) 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 as a sum of consecutive naturals, namely, 10101566010 + 10101566011.

It is an arithmetic number, because the mean of its divisors is an integer number (10101566011).

Almost surely, 2^20203132021 is an apocalyptic number.

It is an amenable number.

20203132021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20203132021 is an equidigital number, since it uses as much as digits as its factorization.

20203132021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20203132021 its reverse (12023130202), we get a palindrome (32226262223).

The spelling of 20203132021 in words is "twenty billion, two hundred three million, one hundred thirty-two thousand, twenty-one".