16623320 has 32 divisors (see below), whose sum is σ = 42746400. Its totient is φ = 5699328.

The previous prime is 16623311. The next prime is 16623337. The reversal of 16623320 is 2332661.

It is a congruent number.

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, 29405 + ... + 29964.

It is an arithmetic number, because the mean of its divisors is an integer number (1335825).

Almost surely, 2^16623320 is an apocalyptic number.

16623320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16623320 is an abundant number, since it is smaller than the sum of its proper divisors (26123080).

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

16623320 is a wasteful number, since it uses less digits than its factorization.

16623320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59387 (or 59383 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 16623320 is about 4077.1705875521. The cubic root of 16623320 is about 255.2148388105.

Adding to 16623320 its reverse (2332661), we get a palindrome (18955981).

The spelling of 16623320 in words is "sixteen million, six hundred twenty-three thousand, three hundred twenty".