20349671 has 8 divisors (see below), whose sum is σ = 21170688. Its totient is φ = 19539000.

The previous prime is 20349643. The next prime is 20349673. The reversal of 20349671 is 17694302.

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

It is a cyclic number.

It is not a de Polignac number, because 20349671 - 2²² = 16155367 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 (20349673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1556 + ... + 6566.

It is an arithmetic number, because the mean of its divisors is an integer number (2646336).

Almost surely, 2^20349671 is an apocalyptic number.

20349671 is a deficient number, since it is larger than the sum of its proper divisors (821017).

20349671 is a wasteful number, since it uses less digits than its factorization.

20349671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5173.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20349671 is about 4511.0609616807. The cubic root of 20349671 is about 273.0145528432.

The spelling of 20349671 in words is "twenty million, three hundred forty-nine thousand, six hundred seventy-one".