20225539 has 2 divisors, whose sum is σ = 20225540. Its totient is φ = 20225538.

The previous prime is 20225521. The next prime is 20225561. The reversal of 20225539 is 93552202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20225539 - 2⁵ = 20225507 is a prime.

It is not a weakly prime, because it can be changed into another prime (20225039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112769 + 10112770.

It is an arithmetic number, because the mean of its divisors is an integer number (10112770).

Almost surely, 2^20225539 is an apocalyptic number.

20225539 is a deficient number, since it is larger than the sum of its proper divisors (1).

20225539 is an equidigital number, since it uses as much as digits as its factorization.

20225539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 20225539 is about 4497.2812898461. The cubic root of 20225539 is about 272.4582951074.

The spelling of 20225539 in words is "twenty million, two hundred twenty-five thousand, five hundred thirty-nine".