20033320 has 32 divisors (see below), whose sum is σ = 45360000. Its totient is φ = 7962688.

The previous prime is 20033309. The next prime is 20033323. The reversal of 20033320 is 2333002.

It is a self number, because there is not a number n which added to its sum of digits gives 20033320.

It is not an unprimeable number, because it can be changed into a prime (20033323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5181 + ... + 8179.

It is an arithmetic number, because the mean of its divisors is an integer number (1417500).

Almost surely, 2^20033320 is an apocalyptic number.

20033320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20033320 is an abundant number, since it is smaller than the sum of its proper divisors (25326680).

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

20033320 is a wasteful number, since it uses less digits than its factorization.

20033320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3177 (or 3173 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 13.

The square root of 20033320 is about 4475.8596939582. The cubic root of 20033320 is about 271.5924186839.

Adding to 20033320 its reverse (2333002), we get a palindrome (22366322).

The spelling of 20033320 in words is "twenty million, thirty-three thousand, three hundred twenty".