16021684 has 48 divisors (see below), whose sum is σ = 34376832. Its totient is φ = 6377472.

The previous prime is 16021679. The next prime is 16021751. The reversal of 16021684 is 48612061.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 45999 + ... + 46345.

It is an arithmetic number, because the mean of its divisors is an integer number (716184).

Almost surely, 2^16021684 is an apocalyptic number.

16021684 is a gapful number since it is divisible by the number (14) 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 16021684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17188416).

16021684 is an abundant number, since it is smaller than the sum of its proper divisors (18355148).

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

16021684 is a wasteful number, since it uses less digits than its factorization.

16021684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 16021684 is about 4002.7095822705. The cubic root of 16021684 is about 252.0979924601.

The spelling of 16021684 in words is "sixteen million, twenty-one thousand, six hundred eighty-four".