20002012621 has 2 divisors, whose sum is σ = 20002012622. Its totient is φ = 20002012620.

The previous prime is 20002012523. The next prime is 20002012663. The reversal of 20002012621 is 12621020002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19248510121 + 753502500 = 138739^2 + 27450^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002012621 - 2⁷ = 20002012493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20002012595 and 20002012604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20092012621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001006310 + 10001006311.

It is an arithmetic number, because the mean of its divisors is an integer number (10001006311).

Almost surely, 2^20002012621 is an apocalyptic number.

It is an amenable number.

20002012621 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002012621 is an equidigital number, since it uses as much as digits as its factorization.

20002012621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20002012621 its reverse (12621020002), we get a palindrome (32623032623).

The spelling of 20002012621 in words is "twenty billion, two million, twelve thousand, six hundred twenty-one".