20004202423 has 2 divisors, whose sum is σ = 20004202424. Its totient is φ = 20004202422.

The previous prime is 20004202399. The next prime is 20004202451. The reversal of 20004202423 is 32420240002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20004202423 - 2⁹ = 20004201911 is a prime.

It is a super-2 number, since 2×20004202423² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20004202423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20004202223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002101211 + 10002101212.

It is an arithmetic number, because the mean of its divisors is an integer number (10002101212).

Almost surely, 2^20004202423 is an apocalyptic number.

20004202423 is a deficient number, since it is larger than the sum of its proper divisors (1).

20004202423 is an equidigital number, since it uses as much as digits as its factorization.

20004202423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 19.

Adding to 20004202423 its reverse (32420240002), we get a palindrome (52424442425).

The spelling of 20004202423 in words is "twenty billion, four million, two hundred two thousand, four hundred twenty-three".