420206540423143 has 2 divisors, whose sum is σ = 420206540423144. Its totient is φ = 420206540423142.

The previous prime is 420206540423129. The next prime is 420206540423231. The reversal of 420206540423143 is 341324045602024.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420206540423143 is a prime.

It is a super-2 number, since 2×420206540423143² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 420206540423096 and 420206540423105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420206540423543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210103270211571 + 210103270211572.

It is an arithmetic number, because the mean of its divisors is an integer number (210103270211572).

Almost surely, 2^{420206540423143} is an apocalyptic number.

420206540423143 is a deficient number, since it is larger than the sum of its proper divisors (1).

420206540423143 is an equidigital number, since it uses as much as digits as its factorization.

420206540423143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 552960, while the sum is 40.

The spelling of 420206540423143 in words is "four hundred twenty trillion, two hundred six billion, five hundred forty million, four hundred twenty-three thousand, one hundred forty-three".