16086621 has 4 divisors (see below), whose sum is σ = 21448832. Its totient is φ = 10724412.

The previous prime is 16086617. The next prime is 16086649. The reversal of 16086621 is 12668061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16086621 - 2² = 16086617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16086611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2681101 + ... + 2681106.

It is an arithmetic number, because the mean of its divisors is an integer number (5362208).

Almost surely, 2^16086621 is an apocalyptic number.

It is an amenable number.

16086621 is a deficient number, since it is larger than the sum of its proper divisors (5362211).

16086621 is an equidigital number, since it uses as much as digits as its factorization.

16086621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5362210.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 16086621 is about 4010.8130098522. The cubic root of 16086621 is about 252.4381235827.

The spelling of 16086621 in words is "sixteen million, eighty-six thousand, six hundred twenty-one".