20671343 has 8 divisors (see below), whose sum is σ = 25772160. Its totient is φ = 16107480.

The previous prime is 20671331. The next prime is 20671361. The reversal of 20671343 is 34317602.

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 20671343 - 2⁶ = 20671279 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 (20671543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134153 + ... + 134306.

It is an arithmetic number, because the mean of its divisors is an integer number (3221520).

Almost surely, 2^20671343 is an apocalyptic number.

20671343 is a deficient number, since it is larger than the sum of its proper divisors (5100817).

20671343 is a wasteful number, since it uses less digits than its factorization.

20671343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268477.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 20671343 is about 4546.5748646646. The cubic root of 20671343 is about 274.4455738846.

Adding to 20671343 its reverse (34317602), we get a palindrome (54988945).

The spelling of 20671343 in words is "twenty million, six hundred seventy-one thousand, three hundred forty-three".