20313204 has 72 divisors (see below), whose sum is σ = 52103520. Its totient is φ = 6140160.

The previous prime is 20313203. The next prime is 20313229. The reversal of 20313204 is 40231302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 383242 + ... + 383294.

It is an arithmetic number, because the mean of its divisors is an integer number (723660).

Almost surely, 2^20313204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20313204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26051760).

20313204 is an abundant number, since it is smaller than the sum of its proper divisors (31790316).

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

20313204 is a wasteful number, since it uses less digits than its factorization.

20313204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20313204 is about 4507.0171954409. The cubic root of 20313204 is about 272.8513728954.

Adding to 20313204 its reverse (40231302), we get a palindrome (60544506).

The spelling of 20313204 in words is "twenty million, three hundred thirteen thousand, two hundred four".