1020423290543 has 2 divisors, whose sum is σ = 1020423290544. Its totient is φ = 1020423290542.

The previous prime is 1020423290539. The next prime is 1020423290573. The reversal of 1020423290543 is 3450923240201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020423290543 - 2² = 1020423290539 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020423290573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510211645271 + 510211645272.

It is an arithmetic number, because the mean of its divisors is an integer number (510211645272).

Almost surely, 2^{1020423290543} is an apocalyptic number.

1020423290543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020423290543 is an equidigital number, since it uses as much as digits as its factorization.

1020423290543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 1020423290543 in words is "one trillion, twenty billion, four hundred twenty-three million, two hundred ninety thousand, five hundred forty-three".