20420104223 has 4 divisors (see below), whose sum is σ = 20420438448. Its totient is φ = 20419770000.

The previous prime is 20420104169. The next prime is 20420104249. The reversal of 20420104223 is 32240102402.

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 20420104223 - 2¹⁴ = 20420087839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20420104195 and 20420104204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420104253) 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, 46403 + ... + 207348.

It is an arithmetic number, because the mean of its divisors is an integer number (5105109612).

Almost surely, 2^20420104223 is an apocalyptic number.

20420104223 is a deficient number, since it is larger than the sum of its proper divisors (334225).

20420104223 is an equidigital number, since it uses as much as digits as its factorization.

20420104223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334224.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20420104223 its reverse (32240102402), we get a palindrome (52660206625).

The spelling of 20420104223 in words is "twenty billion, four hundred twenty million, one hundred four thousand, two hundred twenty-three".