20024213309 has 2 divisors, whose sum is σ = 20024213310. Its totient is φ = 20024213308.

The previous prime is 20024213303. The next prime is 20024213357. The reversal of 20024213309 is 90331242002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14574525625 + 5449687684 = 120725^2 + 73822^2 .

It is a cyclic number.

It is not a de Polignac number, because 20024213309 - 2¹² = 20024209213 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20024213303) 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, 10012106654 + 10012106655.

It is an arithmetic number, because the mean of its divisors is an integer number (10012106655).

Almost surely, 2^20024213309 is an apocalyptic number.

It is an amenable number.

20024213309 is a deficient number, since it is larger than the sum of its proper divisors (1).

20024213309 is an equidigital number, since it uses as much as digits as its factorization.

20024213309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The spelling of 20024213309 in words is "twenty billion, twenty-four million, two hundred thirteen thousand, three hundred nine".