20313212089 has 2 divisors, whose sum is σ = 20313212090. Its totient is φ = 20313212088.

The previous prime is 20313212069. The next prime is 20313212123. The reversal of 20313212089 is 98021231302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19046208064 + 1267004025 = 138008^2 + 35595^2 .

It is a cyclic number.

It is not a de Polignac number, because 20313212089 - 2¹⁵ = 20313179321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20313212089.

It is not a weakly prime, because it can be changed into another prime (20313212009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156606044 + 10156606045.

It is an arithmetic number, because the mean of its divisors is an integer number (10156606045).

Almost surely, 2^20313212089 is an apocalyptic number.

It is an amenable number.

20313212089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313212089 is an equidigital number, since it uses as much as digits as its factorization.

20313212089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 20313212089 in words is "twenty billion, three hundred thirteen million, two hundred twelve thousand, eighty-nine".