20072497 has 2 divisors, whose sum is σ = 20072498. Its totient is φ = 20072496.

The previous prime is 20072489. The next prime is 20072509. The reversal of 20072497 is 79427002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10394176 + 9678321 = 3224^2 + 3111^2 .

It is a cyclic number.

It is not a de Polignac number, because 20072497 - 2³ = 20072489 is a prime.

It is not a weakly prime, because it can be changed into another prime (20072447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10036248 + 10036249.

It is an arithmetic number, because the mean of its divisors is an integer number (10036249).

Almost surely, 2^20072497 is an apocalyptic number.

It is an amenable number.

20072497 is a deficient number, since it is larger than the sum of its proper divisors (1).

20072497 is an equidigital number, since it uses as much as digits as its factorization.

20072497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 20072497 is about 4480.2340340656. The cubic root of 20072497 is about 271.7693447212.

Adding to 20072497 its reverse (79427002), we get a palindrome (99499499).

The spelling of 20072497 in words is "twenty million, seventy-two thousand, four hundred ninety-seven".