20011343 has 6 divisors (see below), whose sum is σ = 21996072. Its totient is φ = 18192020.

The previous prime is 20011319. The next prime is 20011349. The reversal of 20011343 is 34311002.

It is not a de Polignac number, because 20011343 - 2⁸ = 20011087 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 (20011349) 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 5 ways as a sum of consecutive naturals, for example, 82571 + ... + 82812.

It is an arithmetic number, because the mean of its divisors is an integer number (3666012).

Almost surely, 2^20011343 is an apocalyptic number.

20011343 is a deficient number, since it is larger than the sum of its proper divisors (1984729).

20011343 is a wasteful number, since it uses less digits than its factorization.

20011343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165405 (or 165394 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20011343 is about 4473.4039611911. The cubic root of 20011343 is about 271.4930680263.

Adding to 20011343 its reverse (34311002), we get a palindrome (54322345).

The spelling of 20011343 in words is "twenty million, eleven thousand, three hundred forty-three".