20530360 has 32 divisors (see below), whose sum is σ = 46850400. Its totient is φ = 8095360.

The previous prime is 20530351. The next prime is 20530397. The reversal of 20530360 is 6303502.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 775 + ... + 6454.

It is an arithmetic number, because the mean of its divisors is an integer number (1464075).

Almost surely, 2^20530360 is an apocalyptic number.

20530360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20530360 is an abundant number, since it is smaller than the sum of its proper divisors (26320040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20530360 is a wasteful number, since it uses less digits than its factorization.

20530360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7311 (or 7307 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 20530360 is about 4531.0440298015. The cubic root of 20530360 is about 273.8202241253.

Adding to 20530360 its reverse (6303502), we get a palindrome (26833862).

The spelling of 20530360 in words is "twenty million, five hundred thirty thousand, three hundred sixty".