20079321569 has 2 divisors, whose sum is σ = 20079321570. Its totient is φ = 20079321568.

The previous prime is 20079321551. The next prime is 20079321601. The reversal of 20079321569 is 96512397002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16916383969 + 3162937600 = 130063^2 + 56240^2 .

It is a cyclic number.

It is not a de Polignac number, because 20079321569 - 2¹² = 20079317473 is a prime.

It is a super-2 number, since 2×20079321569² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20079324569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10039660784 + 10039660785.

It is an arithmetic number, because the mean of its divisors is an integer number (10039660785).

Almost surely, 2^20079321569 is an apocalyptic number.

It is an amenable number.

20079321569 is a deficient number, since it is larger than the sum of its proper divisors (1).

20079321569 is an equidigital number, since it uses as much as digits as its factorization.

20079321569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 44.

The spelling of 20079321569 in words is "twenty billion, seventy-nine million, three hundred twenty-one thousand, five hundred sixty-nine".