20033220 has 48 divisors (see below), whose sum is σ = 59048640. Its totient is φ = 5060736.

The previous prime is 20033213. The next prime is 20033231. The reversal of 20033220 is 2233002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20033196 and 20033205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7647 + ... + 9926.

It is an arithmetic number, because the mean of its divisors is an integer number (1230180).

Almost surely, 2^20033220 is an apocalyptic number.

20033220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20033220 is an abundant number, since it is smaller than the sum of its proper divisors (39015420).

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

20033220 is a wasteful number, since it uses less digits than its factorization.

20033220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17604 (or 17602 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 20033220 is about 4475.8485229060. The cubic root of 20033220 is about 271.5919667820.

Adding to 20033220 its reverse (2233002), we get a palindrome (22266222).

The spelling of 20033220 in words is "twenty million, thirty-three thousand, two hundred twenty".