21284698159 has 2 divisors, whose sum is σ = 21284698160. Its totient is φ = 21284698158.

The previous prime is 21284698147. The next prime is 21284698189. The reversal of 21284698159 is 95189648212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21284698159 - 2²¹ = 21282601007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21284698129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10642349079 + 10642349080.

It is an arithmetic number, because the mean of its divisors is an integer number (10642349080).

Almost surely, 2^21284698159 is an apocalyptic number.

21284698159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21284698159 is an equidigital number, since it uses as much as digits as its factorization.

21284698159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2488320, while the sum is 55.

The spelling of 21284698159 in words is "twenty-one billion, two hundred eighty-four million, six hundred ninety-eight thousand, one hundred fifty-nine".