20423445343003 has 4 divisors (see below), whose sum is σ = 20425258998288. Its totient is φ = 20421631687720.

The previous prime is 20423445342961. The next prime is 20423445343009. The reversal of 20423445343003 is 30034354432402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20423445343003 - 2³⁷ = 20286006389531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20423445343009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 906810751 + ... + 906833272.

It is an arithmetic number, because the mean of its divisors is an integer number (5106314749572).

Almost surely, 2^{20423445343003} is an apocalyptic number.

20423445343003 is a deficient number, since it is larger than the sum of its proper divisors (1813655285).

20423445343003 is a wasteful number, since it uses less digits than its factorization.

20423445343003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813655284.

The product of its (nonzero) digits is 414720, while the sum is 37.

Adding to 20423445343003 its reverse (30034354432402), we get a palindrome (50457799775405).

The spelling of 20423445343003 in words is "twenty trillion, four hundred twenty-three billion, four hundred forty-five million, three hundred forty-three thousand, three".