16820232 has 128 divisors (see below), whose sum is σ = 51408000. Its totient is φ = 4542720.

The previous prime is 16820189. The next prime is 16820233. The reversal of 16820232 is 23202861.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (16820233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 579994 + ... + 580022.

It is an arithmetic number, because the mean of its divisors is an integer number (401625).

Almost surely, 2^16820232 is an apocalyptic number.

16820232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16820232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25704000).

16820232 is an abundant number, since it is smaller than the sum of its proper divisors (34587768).

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

16820232 is a wasteful number, since it uses less digits than its factorization.

16820232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 16820232 is about 4101.2476150557. The cubic root of 16820232 is about 256.2186039663.

The spelling of 16820232 in words is "sixteen million, eight hundred twenty thousand, two hundred thirty-two".