20004512 has 48 divisors (see below), whose sum is σ = 45505152. Its totient is φ = 8555520.

The previous prime is 20004497. The next prime is 20004521. The reversal of 20004512 is 21540002.

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, 4313 + ... + 7655.

It is an arithmetic number, because the mean of its divisors is an integer number (948024).

Almost surely, 2^20004512 is an apocalyptic number.

20004512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20004512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22752576).

20004512 is an abundant number, since it is smaller than the sum of its proper divisors (25500640).

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

20004512 is a wasteful number, since it uses less digits than its factorization.

20004512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3381 (or 3373 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 20004512 is about 4472.6403834871. The cubic root of 20004512 is about 271.4621725451.

Adding to 20004512 its reverse (21540002), we get a palindrome (41544514).

The spelling of 20004512 in words is "twenty million, four thousand, five hundred twelve".