20002642321 has 2 divisors, whose sum is σ = 20002642322. Its totient is φ = 20002642320.

The previous prime is 20002642313. The next prime is 20002642339. The reversal of 20002642321 is 12324620002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11008206400 + 8994435921 = 104920^2 + 94839^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002642321 - 2³ = 20002642313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20002642292 and 20002642301.

It is not a weakly prime, because it can be changed into another prime (20002645321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001321160 + 10001321161.

It is an arithmetic number, because the mean of its divisors is an integer number (10001321161).

Almost surely, 2^20002642321 is an apocalyptic number.

It is an amenable number.

20002642321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002642321 is an equidigital number, since it uses as much as digits as its factorization.

20002642321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

The spelling of 20002642321 in words is "twenty billion, two million, six hundred forty-two thousand, three hundred twenty-one".