20443313430 has 24 divisors (see below), whose sum is σ = 53152615152. Its totient is φ = 5451550224.

The previous prime is 20443313381. The next prime is 20443313437. The reversal of 20443313430 is 3431334402.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20443313394 and 20443313403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443313437) 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 11 ways as a sum of consecutive naturals, for example, 113573874 + ... + 113574053.

It is an arithmetic number, because the mean of its divisors is an integer number (2214692298).

Almost surely, 2^20443313430 is an apocalyptic number.

20443313430 is an abundant number, since it is smaller than the sum of its proper divisors (32709301722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20443313430 is a wasteful number, since it uses less digits than its factorization.

20443313430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227147940 (or 227147937 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 20443313430 its reverse (3431334402), we get a palindrome (23874647832).

It can be divided in two parts, 2044331 and 3430, that added together give a square (2047761 = 1431²).

The spelling of 20443313430 in words is "twenty billion, four hundred forty-three million, three hundred thirteen thousand, four hundred thirty".