20097577 has 2 divisors, whose sum is σ = 20097578. Its totient is φ = 20097576.

The previous prime is 20097569. The next prime is 20097589. The reversal of 20097577 is 77579002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20034576 + 63001 = 4476^2 + 251^2 .

It is a cyclic number.

It is not a de Polignac number, because 20097577 - 2³ = 20097569 is a prime.

It is not a weakly prime, because it can be changed into another prime (20097677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10048788 + 10048789.

It is an arithmetic number, because the mean of its divisors is an integer number (10048789).

Almost surely, 2^20097577 is an apocalyptic number.

It is an amenable number.

20097577 is a deficient number, since it is larger than the sum of its proper divisors (1).

20097577 is an equidigital number, since it uses as much as digits as its factorization.

20097577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30870, while the sum is 37.

The square root of 20097577 is about 4483.0321212322. The cubic root of 20097577 is about 271.8824869035.

The spelling of 20097577 in words is "twenty million, ninety-seven thousand, five hundred seventy-seven".