20343784147 has 2 divisors, whose sum is σ = 20343784148. Its totient is φ = 20343784146.

The previous prime is 20343784121. The next prime is 20343784243. The reversal of 20343784147 is 74148734302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20343784147 - 2¹¹ = 20343782099 is a prime.

It is a super-3 number, since 3×20343784147³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20343784117) 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 as a sum of consecutive naturals, namely, 10171892073 + 10171892074.

It is an arithmetic number, because the mean of its divisors is an integer number (10171892074).

Almost surely, 2^20343784147 is an apocalyptic number.

20343784147 is a deficient number, since it is larger than the sum of its proper divisors (1).

20343784147 is an equidigital number, since it uses as much as digits as its factorization.

20343784147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 43.

The spelling of 20343784147 in words is "twenty billion, three hundred forty-three million, seven hundred eighty-four thousand, one hundred forty-seven".