20443313423 has 16 divisors (see below), whose sum is σ = 22404441696. Its totient is φ = 18540213120.

The previous prime is 20443313381. The next prime is 20443313437. The reversal of 20443313423 is 32431334402.

It is a de Polignac number, because none of the positive numbers 2^k-20443313423 is a prime.

It is a super-2 number, since 2×20443313423² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443312423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142961 + ... + 247637.

It is an arithmetic number, because the mean of its divisors is an integer number (1400277606).

Almost surely, 2^20443313423 is an apocalyptic number.

20443313423 is a deficient number, since it is larger than the sum of its proper divisors (1961128273).

20443313423 is a wasteful number, since it uses less digits than its factorization.

20443313423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104954.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 20443313423 its reverse (32431334402), we get a palindrome (52874647825).

The spelling of 20443313423 in words is "twenty billion, four hundred forty-three million, three hundred thirteen thousand, four hundred twenty-three".