20225897 has 2 divisors, whose sum is σ = 20225898. Its totient is φ = 20225896.

The previous prime is 20225851. The next prime is 20225911. The reversal of 20225897 is 79852202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20214016 + 11881 = 4496^2 + 109^2 .

It is a cyclic number.

It is not a de Polignac number, because 20225897 - 2⁸ = 20225641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20225837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112948 + 10112949.

It is an arithmetic number, because the mean of its divisors is an integer number (10112949).

Almost surely, 2^20225897 is an apocalyptic number.

It is an amenable number.

20225897 is a deficient number, since it is larger than the sum of its proper divisors (1).

20225897 is an equidigital number, since it uses as much as digits as its factorization.

20225897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 20225897 is about 4497.3210914944. The cubic root of 20225897 is about 272.4599026376.

The spelling of 20225897 in words is "twenty million, two hundred twenty-five thousand, eight hundred ninety-seven".