20425277 has 2 divisors, whose sum is σ = 20425278. Its totient is φ = 20425276.

The previous prime is 20425271. The next prime is 20425289. The reversal of 20425277 is 77252402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17884441 + 2540836 = 4229^2 + 1594^2 .

It is a cyclic number.

It is not a de Polignac number, because 20425277 - 2⁸ = 20425021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20425271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212638 + 10212639.

It is an arithmetic number, because the mean of its divisors is an integer number (10212639).

Almost surely, 2^20425277 is an apocalyptic number.

It is an amenable number.

20425277 is a deficient number, since it is larger than the sum of its proper divisors (1).

20425277 is an equidigital number, since it uses as much as digits as its factorization.

20425277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 20425277 is about 4519.4332609300. The cubic root of 20425277 is about 273.3522491701.

Adding to 20425277 its reverse (77252402), we get a palindrome (97677679).

It can be divided in two parts, 20425 and 277, that added together give a palindrome (20702).

The spelling of 20425277 in words is "twenty million, four hundred twenty-five thousand, two hundred seventy-seven".