20354497 has 2 divisors, whose sum is σ = 20354498. Its totient is φ = 20354496.

The previous prime is 20354483. The next prime is 20354513. The reversal of 20354497 is 79445302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15649936 + 4704561 = 3956^2 + 2169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20354497 is a prime.

It is not a weakly prime, because it can be changed into another prime (20351497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10177248 + 10177249.

It is an arithmetic number, because the mean of its divisors is an integer number (10177249).

Almost surely, 2^20354497 is an apocalyptic number.

It is an amenable number.

20354497 is a deficient number, since it is larger than the sum of its proper divisors (1).

20354497 is an equidigital number, since it uses as much as digits as its factorization.

20354497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 20354497 is about 4511.5958373950. The cubic root of 20354497 is about 273.0361332754.

Adding to 20354497 its reverse (79445302), we get a palindrome (99799799).

The spelling of 20354497 in words is "twenty million, three hundred fifty-four thousand, four hundred ninety-seven".