16486021 has 6 divisors (see below), whose sum is σ = 16805810. Its totient is φ = 16172208.

The previous prime is 16486013. The next prime is 16486027. The reversal of 16486021 is 12068461.

It can be written as a sum of positive squares in 3 ways, for example, as 2340900 + 14145121 = 1530^2 + 3761^2 .

It is not a de Polignac number, because 16486021 - 2³ = 16486013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16486027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126 + ... + 5743.

Almost surely, 2^16486021 is an apocalyptic number.

It is an amenable number.

16486021 is a deficient number, since it is larger than the sum of its proper divisors (319789).

16486021 is an frugal number, since it uses more digits than its factorization.

16486021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5975 (or 5922 counting only the distinct ones).

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

The square root of 16486021 is about 4060.2981417625. The cubic root of 16486021 is about 254.5102531370.

The spelling of 16486021 in words is "sixteen million, four hundred eighty-six thousand, twenty-one".