20020220309 has 2 divisors, whose sum is σ = 20020220310. Its totient is φ = 20020220308.

The previous prime is 20020220299. The next prime is 20020220351. The reversal of 20020220309 is 90302202002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13118266225 + 6901954084 = 114535^2 + 83078^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020220309 - 2¹² = 20020216213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20020220399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010110154 + 10010110155.

It is an arithmetic number, because the mean of its divisors is an integer number (10010110155).

Almost surely, 2^20020220309 is an apocalyptic number.

It is an amenable number.

20020220309 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020220309 is an equidigital number, since it uses as much as digits as its factorization.

20020220309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The spelling of 20020220309 in words is "twenty billion, twenty million, two hundred twenty thousand, three hundred nine".