20420425206303 has 16 divisors (see below), whose sum is σ = 28076502844416. Its totient is φ = 13194606486240.

The previous prime is 20420425206253. The next prime is 20420425206323. The reversal of 20420425206303 is 30360252402402.

It is not a de Polignac number, because 20420425206303 - 2²⁹ = 20419888335391 is a prime.

It is a super-2 number, since 2×20420425206303² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420425206323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 703022908 + ... + 703051953.

It is an arithmetic number, because the mean of its divisors is an integer number (1754781427776).

Almost surely, 2^{20420425206303} is an apocalyptic number.

20420425206303 is a deficient number, since it is larger than the sum of its proper divisors (7656077638113).

20420425206303 is a wasteful number, since it uses less digits than its factorization.

20420425206303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406075014.

The product of its (nonzero) digits is 69120, while the sum is 33.

Adding to 20420425206303 its reverse (30360252402402), we get a palindrome (50780677608705).

The spelling of 20420425206303 in words is "twenty trillion, four hundred twenty billion, four hundred twenty-five million, two hundred six thousand, three hundred three".