20525267 has 6 divisors (see below), whose sum is σ = 23876388. Its totient is φ = 17593044.

The previous prime is 20525261. The next prime is 20525287. The reversal of 20525267 is 76252502.

It is not a de Polignac number, because 20525267 - 2⁴ = 20525251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20525261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209393 + ... + 209490.

It is an arithmetic number, because the mean of its divisors is an integer number (3979398).

Almost surely, 2^20525267 is an apocalyptic number.

20525267 is a deficient number, since it is larger than the sum of its proper divisors (3351121).

20525267 is an equidigital number, since it uses as much as digits as its factorization.

20525267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418897 (or 418890 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 20525267 is about 4530.4819831890. The cubic root of 20525267 is about 273.7975799090.

Adding to 20525267 its reverse (76252502), we get a palindrome (96777769).

The spelling of 20525267 in words is "twenty million, five hundred twenty-five thousand, two hundred sixty-seven".