20530446 has 24 divisors (see below), whose sum is σ = 41980200. Its totient is φ = 6693552.

The previous prime is 20530427. The next prime is 20530453. The reversal of 20530446 is 64403502.

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 11 ways as a sum of consecutive naturals, for example, 12480 + ... + 14028.

It is an arithmetic number, because the mean of its divisors is an integer number (1749175).

Almost surely, 2^20530446 is an apocalyptic number.

20530446 is an abundant number, since it is smaller than the sum of its proper divisors (21449754).

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

20530446 is a wasteful number, since it uses less digits than its factorization.

20530446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648 (or 1601 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 20530446 is about 4531.0535198781. The cubic root of 20530446 is about 273.8206064616.

Adding to 20530446 its reverse (64403502), we get a palindrome (84933948).

The spelling of 20530446 in words is "twenty million, five hundred thirty thousand, four hundred forty-six".