2013621204 has 144 divisors (see below), whose sum is σ = 5708924928. Its totient is φ = 540086976.

The previous prime is 2013621193. The next prime is 2013621223. The reversal of 2013621204 is 4021263102.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12057529 + ... + 12057695.

It is an arithmetic number, because the mean of its divisors is an integer number (39645312).

Almost surely, 2^2013621204 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 2013621204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2854462464).

2013621204 is an abundant number, since it is smaller than the sum of its proper divisors (3695303724).

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

2013621204 is a wasteful number, since it uses less digits than its factorization.

2013621204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 2013621204 is about 44873.3908235159. The cubic root of 2013621204 is about 1262.7748545651.

Adding to 2013621204 its reverse (4021263102), we get a palindrome (6034884306).

It can be divided in two parts, 201362 and 1204, that added together give a triangular number (202566 = T₆₃₆).

The spelling of 2013621204 in words is "two billion, thirteen million, six hundred twenty-one thousand, two hundred four".