20012804 has 24 divisors (see below), whose sum is σ = 40578048. Its totient is φ = 8458560.

The previous prime is 20012801. The next prime is 20012843. The reversal of 20012804 is 40821002.

It is not an unprimeable number, because it can be changed into a prime (20012801) 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 in 7 ways as a sum of consecutive naturals, for example, 2852 + ... + 6939.

It is an arithmetic number, because the mean of its divisors is an integer number (1690752).

Almost surely, 2^20012804 is an apocalyptic number.

It is an amenable number.

20012804 is an abundant number, since it is smaller than the sum of its proper divisors (20565244).

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

20012804 is a wasteful number, since it uses less digits than its factorization.

20012804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9875 (or 9873 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 20012804 is about 4473.5672566756. The cubic root of 20012804 is about 271.4996749745.

Adding to 20012804 its reverse (40821002), we get a palindrome (60833806).

The spelling of 20012804 in words is "twenty million, twelve thousand, eight hundred four".