21544246143163 has 2 divisors, whose sum is σ = 21544246143164. Its totient is φ = 21544246143162.

The previous prime is 21544246143131. The next prime is 21544246143239. The reversal of 21544246143163 is 36134164244512.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21544246143163 - 2⁵ = 21544246143131 is a prime.

It is not a weakly prime, because it can be changed into another prime (21544346143163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10772123071581 + 10772123071582.

It is an arithmetic number, because the mean of its divisors is an integer number (10772123071582).

Almost surely, 2^{21544246143163} is an apocalyptic number.

21544246143163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21544246143163 is an equidigital number, since it uses as much as digits as its factorization.

21544246143163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1658880, while the sum is 46.

The spelling of 21544246143163 in words is "twenty-one trillion, five hundred forty-four billion, two hundred forty-six million, one hundred forty-three thousand, one hundred sixty-three".