16194021 has 8 divisors (see below), whose sum is σ = 21790560. Its totient is φ = 10696752.

The previous prime is 16194007. The next prime is 16194029. The reversal of 16194021 is 12049161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16194021 - 2⁹ = 16193509 is a prime.

It is a super-2 number, since 2×16194021² = 524492632296882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16193982 and 16194000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16194029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24435 + ... + 25088.

It is an arithmetic number, because the mean of its divisors is an integer number (2723820).

Almost surely, 2^16194021 is an apocalyptic number.

It is an amenable number.

16194021 is a deficient number, since it is larger than the sum of its proper divisors (5596539).

16194021 is a wasteful number, since it uses less digits than its factorization.

16194021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49635.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 16194021 is about 4024.1795437083. The cubic root of 16194021 is about 252.9986668471.

The spelling of 16194021 in words is "sixteen million, one hundred ninety-four thousand, twenty-one".