20143557163 has 2 divisors, whose sum is σ = 20143557164. Its totient is φ = 20143557162.

The previous prime is 20143557149. The next prime is 20143557197. The reversal of 20143557163 is 36175534102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20143557163 - 2¹⁷ = 20143426091 is a prime.

It is not a weakly prime, because it can be changed into another prime (20143555163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10071778581 + 10071778582.

It is an arithmetic number, because the mean of its divisors is an integer number (10071778582).

Almost surely, 2^20143557163 is an apocalyptic number.

20143557163 is a deficient number, since it is larger than the sum of its proper divisors (1).

20143557163 is an equidigital number, since it uses as much as digits as its factorization.

20143557163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 20143557163 in words is "twenty billion, one hundred forty-three million, five hundred fifty-seven thousand, one hundred sixty-three".