20013204 has 24 divisors (see below), whose sum is σ = 47113920. Its totient is φ = 6611584.

The previous prime is 20013193. The next prime is 20013221. The reversal of 20013204 is 40231002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 20013204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6024 + ... + 8735.

It is an arithmetic number, because the mean of its divisors is an integer number (1963080).

Almost surely, 2^20013204 is an apocalyptic number.

It is an amenable number.

20013204 is an abundant number, since it is smaller than the sum of its proper divisors (27100716).

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

20013204 is a wasteful number, since it uses less digits than its factorization.

20013204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14879 (or 14877 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20013204 is about 4473.6119635033. The cubic root of 20013204 is about 271.5014838022.

Adding to 20013204 its reverse (40231002), we get a palindrome (60244206).

The spelling of 20013204 in words is "twenty million, thirteen thousand, two hundred four".