20530395 has 16 divisors (see below), whose sum is σ = 36498720. Its totient is φ = 10949472.

The previous prime is 20530351. The next prime is 20530397. The reversal of 20530395 is 59303502.

It is not a de Polignac number, because 20530395 - 2⁶ = 20530331 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20530397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75904 + ... + 76173.

It is an arithmetic number, because the mean of its divisors is an integer number (2281170).

Almost surely, 2^20530395 is an apocalyptic number.

20530395 is a deficient number, since it is larger than the sum of its proper divisors (15968325).

20530395 is a wasteful number, since it uses less digits than its factorization.

20530395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152091 (or 152085 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 27.

The square root of 20530395 is about 4531.0478920444. The cubic root of 20530395 is about 273.8203797274.

Adding to 20530395 its reverse (59303502), we get a palindrome (79833897).

The spelling of 20530395 in words is "twenty million, five hundred thirty thousand, three hundred ninety-five".