20255530 has 8 divisors (see below), whose sum is σ = 36459972. Its totient is φ = 8102208.

The previous prime is 20255527. The next prime is 20255533. The reversal of 20255530 is 3555202.

It is an interprime number because it is at equal distance from previous prime (20255527) and next prime (20255533).

It can be written as a sum of positive squares in 2 ways, for example, as 18292729 + 1962801 = 4277^2 + 1401^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20255533) 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 in 3 ways as a sum of consecutive naturals, for example, 1012767 + ... + 1012786.

Almost surely, 2^20255530 is an apocalyptic number.

20255530 is a deficient number, since it is larger than the sum of its proper divisors (16204442).

20255530 is a wasteful number, since it uses less digits than its factorization.

20255530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2025560.

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 20255530 is about 4500.6144025011. The cubic root of 20255530 is about 272.5928982144.

The spelling of 20255530 in words is "twenty million, two hundred fifty-five thousand, five hundred thirty".