20342040403 has 2 divisors, whose sum is σ = 20342040404. Its totient is φ = 20342040402.

The previous prime is 20342040377. The next prime is 20342040409. The reversal of 20342040403 is 30404024302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20342040403 - 2⁵ = 20342040371 is a prime.

It is not a weakly prime, because it can be changed into another prime (20342040409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10171020201 + 10171020202.

It is an arithmetic number, because the mean of its divisors is an integer number (10171020202).

Almost surely, 2^20342040403 is an apocalyptic number.

20342040403 is a deficient number, since it is larger than the sum of its proper divisors (1).

20342040403 is an equidigital number, since it uses as much as digits as its factorization.

20342040403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 20342040403 its reverse (30404024302), we get a palindrome (50746064705).

The spelling of 20342040403 in words is "twenty billion, three hundred forty-two million, forty thousand, four hundred three".