20203013021 has 2 divisors, whose sum is σ = 20203013022. Its totient is φ = 20203013020.

The previous prime is 20203013011. The next prime is 20203013029. The reversal of 20203013021 is 12031030202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20026495225 + 176517796 = 141515^2 + 13286^2 .

It is a cyclic number.

It is not a de Polignac number, because 20203013021 - 2⁶ = 20203012957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20203012987 and 20203013005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20203013029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101506510 + 10101506511.

It is an arithmetic number, because the mean of its divisors is an integer number (10101506511).

Almost surely, 2^20203013021 is an apocalyptic number.

It is an amenable number.

20203013021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20203013021 is an equidigital number, since it uses as much as digits as its factorization.

20203013021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20203013021 its reverse (12031030202), we get a palindrome (32234043223).

The spelling of 20203013021 in words is "twenty billion, two hundred three million, thirteen thousand, twenty-one".