20504330 has 64 divisors (see below), whose sum is σ = 47554560. Its totient is φ = 6177600.

The previous prime is 20504221. The next prime is 20504353. The reversal of 20504330 is 3340502.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20504299 and 20504308.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23441 + ... + 24299.

It is an arithmetic number, because the mean of its divisors is an integer number (743040).

Almost surely, 2^20504330 is an apocalyptic number.

20504330 is an abundant number, since it is smaller than the sum of its proper divisors (27050230).

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

20504330 is a wasteful number, since it uses less digits than its factorization.

20504330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 20504330 is about 4528.1707123296. The cubic root of 20504330 is about 273.7044516004.

Adding to 20504330 its reverse (3340502), we get a palindrome (23844832).

The spelling of 20504330 in words is "twenty million, five hundred four thousand, three hundred thirty".