16573220 has 24 divisors (see below), whose sum is σ = 35927808. Its totient is φ = 6415200.

The previous prime is 16573213. The next prime is 16573223. The reversal of 16573220 is 2237561.

It is a self number, because there is not a number n which added to its sum of digits gives 16573220.

It is not an unprimeable number, because it can be changed into a prime (16573223) 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, 12746 + ... + 13985.

It is an arithmetic number, because the mean of its divisors is an integer number (1496992).

Almost surely, 2^16573220 is an apocalyptic number.

16573220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16573220 is an abundant number, since it is smaller than the sum of its proper divisors (19354588).

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

16573220 is a wasteful number, since it uses less digits than its factorization.

16573220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26771 (or 26769 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 16573220 is about 4071.0219847110. The cubic root of 16573220 is about 254.9581887106.

The spelling of 16573220 in words is "sixteen million, five hundred seventy-three thousand, two hundred twenty".