20356635354043 has 2 divisors, whose sum is σ = 20356635354044. Its totient is φ = 20356635354042.

The previous prime is 20356635354031. The next prime is 20356635354127. The reversal of 20356635354043 is 34045353665302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20356635354043 - 2²⁹ = 20356098483131 is a prime.

It is not a weakly prime, because it can be changed into another prime (20356635358043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10178317677021 + 10178317677022.

It is an arithmetic number, because the mean of its divisors is an integer number (10178317677022).

Almost surely, 2^{20356635354043} is an apocalyptic number.

20356635354043 is a deficient number, since it is larger than the sum of its proper divisors (1).

20356635354043 is an equidigital number, since it uses as much as digits as its factorization.

20356635354043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664000, while the sum is 49.

The spelling of 20356635354043 in words is "twenty trillion, three hundred fifty-six billion, six hundred thirty-five million, three hundred fifty-four thousand, forty-three".