20231693 has 2 divisors, whose sum is σ = 20231694. Its totient is φ = 20231692.

The previous prime is 20231689. The next prime is 20231707. The reversal of 20231693 is 39613202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17960644 + 2271049 = 4238^2 + 1507^2 .

It is a cyclic number.

It is not a de Polignac number, because 20231693 - 2² = 20231689 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20231093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10115846 + 10115847.

It is an arithmetic number, because the mean of its divisors is an integer number (10115847).

Almost surely, 2^20231693 is an apocalyptic number.

It is an amenable number.

20231693 is a deficient number, since it is larger than the sum of its proper divisors (1).

20231693 is an equidigital number, since it uses as much as digits as its factorization.

20231693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 20231693 is about 4497.9654289467. The cubic root of 20231693 is about 272.4859258225.

Adding to 20231693 its reverse (39613202), we get a palindrome (59844895).

The spelling of 20231693 in words is "twenty million, two hundred thirty-one thousand, six hundred ninety-three".