20125697 has 2 divisors, whose sum is σ = 20125698. Its totient is φ = 20125696.

The previous prime is 20125649. The next prime is 20125723. The reversal of 20125697 is 79652102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18800896 + 1324801 = 4336^2 + 1151^2 .

It is a cyclic number.

It is not a de Polignac number, because 20125697 - 2²² = 15931393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20125607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10062848 + 10062849.

It is an arithmetic number, because the mean of its divisors is an integer number (10062849).

Almost surely, 2^20125697 is an apocalyptic number.

It is an amenable number.

20125697 is a deficient number, since it is larger than the sum of its proper divisors (1).

20125697 is an equidigital number, since it uses as much as digits as its factorization.

20125697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 20125697 is about 4486.1672951418. The cubic root of 20125697 is about 272.0092314125.

Adding to 20125697 its reverse (79652102), we get a palindrome (99777799).

The spelling of 20125697 in words is "twenty million, one hundred twenty-five thousand, six hundred ninety-seven".