20311162693 has 2 divisors, whose sum is σ = 20311162694. Its totient is φ = 20311162692.

The previous prime is 20311162687. The next prime is 20311162699. The reversal of 20311162693 is 39626111302.

It is a balanced prime because it is at equal distance from previous prime (20311162687) and next prime (20311162699).

It can be written as a sum of positive squares in only one way, i.e., 19154006404 + 1157156289 = 138398^2 + 34017^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20311162693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20311162699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155581346 + 10155581347.

It is an arithmetic number, because the mean of its divisors is an integer number (10155581347).

Almost surely, 2^20311162693 is an apocalyptic number.

It is an amenable number.

20311162693 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311162693 is an equidigital number, since it uses as much as digits as its factorization.

20311162693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 34.

Adding to 20311162693 its reverse (39626111302), we get a palindrome (59937273995).

The spelling of 20311162693 in words is "twenty billion, three hundred eleven million, one hundred sixty-two thousand, six hundred ninety-three".