33118220 has 24 divisors (see below), whose sum is σ = 69847008. Its totient is φ = 13190400.

The previous prime is 33118187. The next prime is 33118231. The reversal of 33118220 is 2281133.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 33118192 and 33118201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1385 + ... + 8255.

It is an arithmetic number, because the mean of its divisors is an integer number (2910292).

Almost surely, 2^33118220 is an apocalyptic number.

It is an amenable number.

33118220 is an abundant number, since it is smaller than the sum of its proper divisors (36728788).

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

33118220 is a wasteful number, since it uses less digits than its factorization.

33118220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7121 (or 7119 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 33118220 is about 5754.8431777069. The cubic root of 33118220 is about 321.1360014798.

Adding to 33118220 its reverse (2281133), we get a palindrome (35399353).

The spelling of 33118220 in words is "thirty-three million, one hundred eighteen thousand, two hundred twenty".