20354353156343 has 2 divisors, whose sum is σ = 20354353156344. Its totient is φ = 20354353156342.

The previous prime is 20354353156327. The next prime is 20354353156433. The reversal of 20354353156343 is 34365135345302.

It is a happy number.

Together with next prime (20354353156433) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20354353156343 - 2⁴ = 20354353156327 is a prime.

It is a super-2 number, since 2×20354353156343² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20354353150343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10177176578171 + 10177176578172.

It is an arithmetic number, because the mean of its divisors is an integer number (10177176578172).

Almost surely, 2^{20354353156343} is an apocalyptic number.

20354353156343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20354353156343 is an equidigital number, since it uses as much as digits as its factorization.

20354353156343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832000, while the sum is 47.

The spelling of 20354353156343 in words is "twenty trillion, three hundred fifty-four billion, three hundred fifty-three million, one hundred fifty-six thousand, three hundred forty-three".