20034420243403 has 2 divisors, whose sum is σ = 20034420243404. Its totient is φ = 20034420243402.

The previous prime is 20034420243389. The next prime is 20034420243437. The reversal of 20034420243403 is 30434202443002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20034420243403 is a prime.

It is not a weakly prime, because it can be changed into another prime (20034420243203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10017210121701 + 10017210121702.

It is an arithmetic number, because the mean of its divisors is an integer number (10017210121702).

Almost surely, 2^{20034420243403} is an apocalyptic number.

20034420243403 is a deficient number, since it is larger than the sum of its proper divisors (1).

20034420243403 is an equidigital number, since it uses as much as digits as its factorization.

20034420243403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 31.

Adding to 20034420243403 its reverse (30434202443002), we get a palindrome (50468622686405).

The spelling of 20034420243403 in words is "twenty trillion, thirty-four billion, four hundred twenty million, two hundred forty-three thousand, four hundred three".