20480004 has 36 divisors (see below), whose sum is σ = 52484796. Its totient is φ = 6732288.

The previous prime is 20479999. The next prime is 20480011. The reversal of 20480004 is 40008402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16793604 + 3686400 = 4098^2 + 1920^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1269 + ... + 6524.

It is an arithmetic number, because the mean of its divisors is an integer number (1457911).

Almost surely, 2^20480004 is an apocalyptic number.

It is an amenable number.

20480004 is an abundant number, since it is smaller than the sum of its proper divisors (32004792).

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

20480004 is a wasteful number, since it uses less digits than its factorization.

20480004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7876 (or 7871 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 20480004 is about 4525.4838415356. The cubic root of 20480004 is about 273.5961692805.

Adding to 20480004 its reverse (40008402), we get a palindrome (60488406).

It can be divided in two parts, 204 and 80004, that added together give a palindrome (80208).

The spelling of 20480004 in words is "twenty million, four hundred eighty thousand, four".