20403032420443 has 8 divisors (see below), whose sum is σ = 20549670301440. Its totient is φ = 20256685778280.

The previous prime is 20403032420431. The next prime is 20403032420471. The reversal of 20403032420443 is 34402423030402.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20403032420443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20403032420413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72669093 + ... + 72949318.

It is an arithmetic number, because the mean of its divisors is an integer number (2568708787680).

Almost surely, 2^{20403032420443} is an apocalyptic number.

20403032420443 is a deficient number, since it is larger than the sum of its proper divisors (146637880997).

20403032420443 is a wasteful number, since it uses less digits than its factorization.

20403032420443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145619417.

The product of its (nonzero) digits is 55296, while the sum is 31.

Adding to 20403032420443 its reverse (34402423030402), we get a palindrome (54805455450845).

The spelling of 20403032420443 in words is "twenty trillion, four hundred three billion, thirty-two million, four hundred twenty thousand, four hundred forty-three".