20122693 has 2 divisors, whose sum is σ = 20122694. Its totient is φ = 20122692.

The previous prime is 20122673. The next prime is 20122699. The reversal of 20122693 is 39622102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17032129 + 3090564 = 4127^2 + 1758^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20122693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20122699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061346 + 10061347.

It is an arithmetic number, because the mean of its divisors is an integer number (10061347).

Almost surely, 2^20122693 is an apocalyptic number.

It is an amenable number.

20122693 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122693 is an equidigital number, since it uses as much as digits as its factorization.

20122693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20122693 is about 4485.8324756950. The cubic root of 20122693 is about 271.9956971998.

Adding to 20122693 its reverse (39622102), we get a palindrome (59744795).

The spelling of 20122693 in words is "twenty million, one hundred twenty-two thousand, six hundred ninety-three".