20443420403 has 8 divisors (see below), whose sum is σ = 23595235680. Its totient is φ = 17349436800.

The previous prime is 20443420351. The next prime is 20443420411. The reversal of 20443420403 is 30402434402.

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 20443420403 - 2⁶ = 20443420339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20443420423) 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, 14457158 + ... + 14458571.

It is an arithmetic number, because the mean of its divisors is an integer number (2949404460).

Almost surely, 2^20443420403 is an apocalyptic number.

20443420403 is a deficient number, since it is larger than the sum of its proper divisors (3151815277).

20443420403 is a wasteful number, since it uses less digits than its factorization.

20443420403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28915837.

The product of its (nonzero) digits is 9216, while the sum is 26.

Adding to 20443420403 its reverse (30402434402), we get a palindrome (50845854805).

The spelling of 20443420403 in words is "twenty billion, four hundred forty-three million, four hundred twenty thousand, four hundred three".