20031310697 has 2 divisors, whose sum is σ = 20031310698. Its totient is φ = 20031310696.

The previous prime is 20031310669. The next prime is 20031310753. The reversal of 20031310697 is 79601313002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14030639401 + 6000671296 = 118451^2 + 77464^2 .

It is a cyclic number.

It is not a de Polignac number, because 20031310697 - 2¹⁴ = 20031294313 is a prime.

It is not a weakly prime, because it can be changed into another prime (20031310097) 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, 10015655348 + 10015655349.

It is an arithmetic number, because the mean of its divisors is an integer number (10015655349).

Almost surely, 2^20031310697 is an apocalyptic number.

It is an amenable number.

20031310697 is a deficient number, since it is larger than the sum of its proper divisors (1).

20031310697 is an equidigital number, since it uses as much as digits as its factorization.

20031310697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 32.

Adding to 20031310697 its reverse (79601313002), we get a palindrome (99632623699).

The spelling of 20031310697 in words is "twenty billion, thirty-one million, three hundred ten thousand, six hundred ninety-seven".