20211343 has 4 divisors (see below), whose sum is σ = 20228920. Its totient is φ = 20193768.

The previous prime is 20211263. The next prime is 20211377. The reversal of 20211343 is 34311202.

It is a happy number.

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 20211343 - 2⁹ = 20210831 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211643) 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 3 ways as a sum of consecutive naturals, for example, 6933 + ... + 9406.

It is an arithmetic number, because the mean of its divisors is an integer number (5057230).

Almost surely, 2^20211343 is an apocalyptic number.

20211343 is a deficient number, since it is larger than the sum of its proper divisors (17577).

20211343 is a wasteful number, since it uses less digits than its factorization.

20211343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17576.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20211343 is about 4495.7027259373. The cubic root of 20211343 is about 272.3945354018.

Adding to 20211343 its reverse (34311202), we get a palindrome (54522545).

It can be divided in two parts, 2021 and 1343, that added together give a square (3364 = 58²).

The spelling of 20211343 in words is "twenty million, two hundred eleven thousand, three hundred forty-three".