20420112443 has 8 divisors (see below), whose sum is σ = 20928390336. Its totient is φ = 19912321600.

The previous prime is 20420112409. The next prime is 20420112463. The reversal of 20420112443 is 34421102402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20420112443 - 2¹⁸ = 20419850299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20420112463) 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 7 ways as a sum of consecutive naturals, for example, 36128 + ... + 205293.

It is an arithmetic number, because the mean of its divisors is an integer number (2616048792).

Almost surely, 2^20420112443 is an apocalyptic number.

20420112443 is a deficient number, since it is larger than the sum of its proper divisors (508277893).

20420112443 is a wasteful number, since it uses less digits than its factorization.

20420112443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243525.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 20420112443 its reverse (34421102402), we get a palindrome (54841214845).

The spelling of 20420112443 in words is "twenty billion, four hundred twenty million, one hundred twelve thousand, four hundred forty-three".