16021944 has 24 divisors (see below), whose sum is σ = 43392960. Its totient is φ = 5340624.

The previous prime is 16021937. The next prime is 16021969. The reversal of 16021944 is 44912061.

16021944 is a `hidden beast` number, since 1 + 602 + 19 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111192 + ... + 111335.

It is an arithmetic number, because the mean of its divisors is an integer number (1808040).

Almost surely, 2^16021944 is an apocalyptic number.

It is an amenable number.

16021944 is an abundant number, since it is smaller than the sum of its proper divisors (27371016).

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

16021944 is a wasteful number, since it uses less digits than its factorization.

16021944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222539 (or 222532 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 16021944 is about 4002.7420601383. The cubic root of 16021944 is about 252.0993561354.

The spelling of 16021944 in words is "sixteen million, twenty-one thousand, nine hundred forty-four".