16333220 has 24 divisors (see below), whose sum is σ = 35792064. Its totient is φ = 6249056.

The previous prime is 16333201. The next prime is 16333223. The reversal of 16333220 is 2233361.

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 = 16333192 and 16333201.

It is not an unprimeable number, because it can be changed into a prime (16333223) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 17294 + ... + 18213.

It is an arithmetic number, because the mean of its divisors is an integer number (1491336).

Almost surely, 2^16333220 is an apocalyptic number.

16333220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16333220 is an abundant number, since it is smaller than the sum of its proper divisors (19458844).

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

16333220 is a wasteful number, since it uses less digits than its factorization.

16333220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35539 (or 35537 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 16333220 is about 4041.4378629394. The cubic root of 16333220 is about 253.7215001924.

Adding to 16333220 its reverse (2233361), we get a palindrome (18566581).

The spelling of 16333220 in words is "sixteen million, three hundred thirty-three thousand, two hundred twenty".