20204512 has 12 divisors (see below), whose sum is σ = 39777696. Its totient is φ = 10102240.

The previous prime is 20204477. The next prime is 20204519. The reversal of 20204512 is 21540202.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20204519) 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, 315664 + ... + 315727.

It is an arithmetic number, because the mean of its divisors is an integer number (3314808).

Almost surely, 2^20204512 is an apocalyptic number.

It is an amenable number.

20204512 is a deficient number, since it is larger than the sum of its proper divisors (19573184).

20204512 is an equidigital number, since it uses as much as digits as its factorization.

20204512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631401 (or 631393 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20204512 is about 4494.9429362340. The cubic root of 20204512 is about 272.3638441090.

Adding to 20204512 its reverse (21540202), we get a palindrome (41744714).

The spelling of 20204512 in words is "twenty million, two hundred four thousand, five hundred twelve".