20443344319 has 4 divisors (see below), whose sum is σ = 20654100544. Its totient is φ = 20232588096.

The previous prime is 20443344307. The next prime is 20443344323. The reversal of 20443344319 is 91344334402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91344334402 = 2 ⋅45672167201.

It is a cyclic number.

It is not a de Polignac number, because 20443344319 - 2⁹ = 20443343807 is a prime.

It is a super-2 number, since 2×20443344319² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443344379) 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, 105377967 + ... + 105378160.

It is an arithmetic number, because the mean of its divisors is an integer number (5163525136).

Almost surely, 2^20443344319 is an apocalyptic number.

20443344319 is a deficient number, since it is larger than the sum of its proper divisors (210756225).

20443344319 is an equidigital number, since it uses as much as digits as its factorization.

20443344319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210756224.

The product of its (nonzero) digits is 124416, while the sum is 37.

The spelling of 20443344319 in words is "twenty billion, four hundred forty-three million, three hundred forty-four thousand, three hundred nineteen".