20481084 has 72 divisors (see below), whose sum is σ = 56412720. Its totient is φ = 6227712.

The previous prime is 20481079. The next prime is 20481193. The reversal of 20481084 is 48018402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49872 + ... + 50280.

It is an arithmetic number, because the mean of its divisors is an integer number (783510).

Almost surely, 2^20481084 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 20481084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28206360).

20481084 is an abundant number, since it is smaller than the sum of its proper divisors (35931636).

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

20481084 is a wasteful number, since it uses less digits than its factorization.

20481084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539 (or 534 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 20481084 is about 4525.6031642202. The cubic root of 20481084 is about 273.6009785027.

Adding to 20481084 its reverse (48018402), we get a palindrome (68499486).

The spelling of 20481084 in words is "twenty million, four hundred eighty-one thousand, eighty-four".