20440210343 has 4 divisors (see below), whose sum is σ = 23360240400. Its totient is φ = 17520180288.

The previous prime is 20440210327. The next prime is 20440210379. The reversal of 20440210343 is 34301204402.

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 20440210343 - 2⁴ = 20440210327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440210243) 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, 1460015018 + ... + 1460015031.

It is an arithmetic number, because the mean of its divisors is an integer number (5840060100).

Almost surely, 2^20440210343 is an apocalyptic number.

20440210343 is a deficient number, since it is larger than the sum of its proper divisors (2920030057).

20440210343 is an equidigital number, since it uses as much as digits as its factorization.

20440210343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920030056.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20440210343 its reverse (34301204402), we get a palindrome (54741414745).

The spelling of 20440210343 in words is "twenty billion, four hundred forty million, two hundred ten thousand, three hundred forty-three".