16943920 has 80 divisors (see below), whose sum is σ = 45711360. Its totient is φ = 5720832.

The previous prime is 16943881. The next prime is 16943921. The reversal of 16943920 is 2934961.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (16943921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44049 + ... + 44431.

It is an arithmetic number, because the mean of its divisors is an integer number (571392).

Almost surely, 2^16943920 is an apocalyptic number.

16943920 is a gapful number since it is divisible by the number (10) 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 16943920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22855680).

16943920 is an abundant number, since it is smaller than the sum of its proper divisors (28767440).

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

16943920 is a wasteful number, since it uses less digits than its factorization.

16943920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 16943920 is about 4116.2993088453. The cubic root of 16943920 is about 256.8451074511.

The spelling of 16943920 in words is "sixteen million, nine hundred forty-three thousand, nine hundred twenty".