20313331289 has 2 divisors, whose sum is σ = 20313331290. Its totient is φ = 20313331288.

The previous prime is 20313331277. The next prime is 20313331301. The reversal of 20313331289 is 98213331302.

It is a balanced prime because it is at equal distance from previous prime (20313331277) and next prime (20313331301).

It can be written as a sum of positive squares in only one way, i.e., 16694707264 + 3618624025 = 129208^2 + 60155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20313331289 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20313331249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156665644 + 10156665645.

It is an arithmetic number, because the mean of its divisors is an integer number (10156665645).

Almost surely, 2^20313331289 is an apocalyptic number.

It is an amenable number.

20313331289 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313331289 is an equidigital number, since it uses as much as digits as its factorization.

20313331289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The spelling of 20313331289 in words is "twenty billion, three hundred thirteen million, three hundred thirty-one thousand, two hundred eighty-nine".