20443097 has 2 divisors, whose sum is σ = 20443098. Its totient is φ = 20443096.

The previous prime is 20443091. The next prime is 20443109. The reversal of 20443097 is 79034402.

20443097 is nontrivially palindromic in base 2.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20394256 + 48841 = 4516^2 + 221^2 .

It is a cyclic number.

It is not a de Polignac number, because 20443097 - 2⁴ = 20443081 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20443091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221548 + 10221549.

It is an arithmetic number, because the mean of its divisors is an integer number (10221549).

Almost surely, 2^20443097 is an apocalyptic number.

It is an amenable number.

20443097 is a deficient number, since it is larger than the sum of its proper divisors (1).

20443097 is an equidigital number, since it uses as much as digits as its factorization.

20443097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20443097 is about 4521.4043172448. The cubic root of 20443097 is about 273.4317213059.

Adding to 20443097 its reverse (79034402), we get a palindrome (99477499).

The spelling of 20443097 in words is "twenty million, four hundred forty-three thousand, ninety-seven".