16321940 has 24 divisors (see below), whose sum is σ = 35075040. Its totient is φ = 6376608.

The previous prime is 16321909. The next prime is 16321957. The reversal of 16321940 is 4912361.

16321940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 8630 + ... + 10349.

It is an arithmetic number, because the mean of its divisors is an integer number (1461460).

Almost surely, 2^16321940 is an apocalyptic number.

16321940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16321940 is an abundant number, since it is smaller than the sum of its proper divisors (18753100).

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

16321940 is a wasteful number, since it uses less digits than its factorization.

16321940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19031 (or 19029 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 16321940 is about 4040.0420789888. The cubic root of 16321940 is about 253.6630786112.

The spelling of 16321940 in words is "sixteen million, three hundred twenty-one thousand, nine hundred forty".