20013104 has 40 divisors (see below), whose sum is σ = 40437888. Its totient is φ = 9584640.

The previous prime is 20013083. The next prime is 20013107. The reversal of 20013104 is 40131002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77744 + ... + 78000.

Almost surely, 2^20013104 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 20013104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20218944).

20013104 is an abundant number, since it is smaller than the sum of its proper divisors (20424784).

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

20013104 is a wasteful number, since it uses less digits than its factorization.

20013104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20013104 is about 4473.6007868383. The cubic root of 20013104 is about 271.5010315976.

Adding to 20013104 its reverse (40131002), we get a palindrome (60144106).

The spelling of 20013104 in words is "twenty million, thirteen thousand, one hundred four".