20421110133303 has 16 divisors (see below), whose sum is σ = 29703548848896. Its totient is φ = 12376382080640.

The previous prime is 20421110133257. The next prime is 20421110133317. The reversal of 20421110133303 is 30333101112402.

It is a cyclic number.

It is not a de Polignac number, because 20421110133303 - 2¹² = 20421110129207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20421110133343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8553550 + ... + 10677332.

It is an arithmetic number, because the mean of its divisors is an integer number (1856471803056).

Almost surely, 2^{20421110133303} is an apocalyptic number.

20421110133303 is a deficient number, since it is larger than the sum of its proper divisors (9282438715593).

20421110133303 is a wasteful number, since it uses less digits than its factorization.

20421110133303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415174.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 20421110133303 its reverse (30333101112402), we get a palindrome (50754211245705).

The spelling of 20421110133303 in words is "twenty trillion, four hundred twenty-one billion, one hundred ten million, one hundred thirty-three thousand, three hundred three".