16021764 has 36 divisors (see below), whose sum is σ = 44182320. Its totient is φ = 4854960.

The previous prime is 16021751. The next prime is 16021771. The reversal of 16021764 is 46712061.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19834 + ... + 20625.

Almost surely, 2^16021764 is an apocalyptic number.

It is an amenable number.

16021764 is an abundant number, since it is smaller than the sum of its proper divisors (28160556).

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

16021764 is a wasteful number, since it uses less digits than its factorization.

16021764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40480 (or 40475 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 16021764 is about 4002.7195754886. The cubic root of 16021764 is about 252.0984120540.

The spelling of 16021764 in words is "sixteen million, twenty-one thousand, seven hundred sixty-four".