20130504 has 16 divisors (see below), whose sum is σ = 50326320. Its totient is φ = 6710160.

The previous prime is 20130503. The next prime is 20130521. The reversal of 20130504 is 40503102.

It is not an unprimeable number, because it can be changed into a prime (20130503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419362 + ... + 419409.

It is an arithmetic number, because the mean of its divisors is an integer number (3145395).

Almost surely, 2^20130504 is an apocalyptic number.

20130504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20130504 is an abundant number, since it is smaller than the sum of its proper divisors (30195816).

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

20130504 is a wasteful number, since it uses less digits than its factorization.

20130504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838780 (or 838776 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20130504 is about 4486.7030211504. The cubic root of 20130504 is about 272.0308860544.

Adding to 20130504 its reverse (40503102), we get a palindrome (60633606).

The spelling of 20130504 in words is "twenty million, one hundred thirty thousand, five hundred four".