20170343 has 4 divisors (see below), whose sum is σ = 21231960. Its totient is φ = 19108728.

The previous prime is 20170331. The next prime is 20170363. The reversal of 20170343 is 34307102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20170343 - 2¹² = 20166247 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 (20170303) 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, 530780 + ... + 530817.

It is an arithmetic number, because the mean of its divisors is an integer number (5307990).

Almost surely, 2^20170343 is an apocalyptic number.

20170343 is a deficient number, since it is larger than the sum of its proper divisors (1061617).

20170343 is a wasteful number, since it uses less digits than its factorization.

20170343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061616.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 20170343 is about 4491.1405010309. The cubic root of 20170343 is about 272.2102208108.

Adding to 20170343 its reverse (34307102), we get a palindrome (54477445).

The spelling of 20170343 in words is "twenty million, one hundred seventy thousand, three hundred forty-three".