20225507 has 2 divisors, whose sum is σ = 20225508. Its totient is φ = 20225506.

The previous prime is 20225503. The next prime is 20225521. The reversal of 20225507 is 70552202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20225507 - 2² = 20225503 is a prime.

It is a super-2 number, since 2×20225507² = 818142266814098, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20225503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112753 + 10112754.

It is an arithmetic number, because the mean of its divisors is an integer number (10112754).

Almost surely, 2^20225507 is an apocalyptic number.

20225507 is a deficient number, since it is larger than the sum of its proper divisors (1).

20225507 is an equidigital number, since it uses as much as digits as its factorization.

20225507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 20225507 is about 4497.2777321397. The cubic root of 20225507 is about 272.4581514166.

Adding to 20225507 its reverse (70552202), we get a palindrome (90777709).

The spelling of 20225507 in words is "twenty million, two hundred twenty-five thousand, five hundred seven".