20003320 has 16 divisors (see below), whose sum is σ = 45007560. Its totient is φ = 8001312.

The previous prime is 20003317. The next prime is 20003369. The reversal of 20003320 is 2330002.

It is a super-2 number, since 2×20003320² = 800265622044800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20003297 and 20003306.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 250002 + ... + 250081.

Almost surely, 2^20003320 is an apocalyptic number.

20003320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20003320 is an abundant number, since it is smaller than the sum of its proper divisors (25004240).

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

20003320 is a wasteful number, since it uses less digits than its factorization.

20003320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500094 (or 500090 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 10.

The square root of 20003320 is about 4472.5071268809. The cubic root of 20003320 is about 271.4567806060.

Adding to 20003320 its reverse (2330002), we get a palindrome (22333322).

The spelling of 20003320 in words is "twenty million, three thousand, three hundred twenty".