21355466424179 has 2 divisors, whose sum is σ = 21355466424180. Its totient is φ = 21355466424178.

The previous prime is 21355466424157. The next prime is 21355466424203. The reversal of 21355466424179 is 97142466455312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21355466424179 - 2¹² = 21355466420083 is a prime.

It is not a weakly prime, because it can be changed into another prime (21355466424109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10677733212089 + 10677733212090.

It is an arithmetic number, because the mean of its divisors is an integer number (10677733212090).

Almost surely, 2^{21355466424179} is an apocalyptic number.

21355466424179 is a deficient number, since it is larger than the sum of its proper divisors (1).

21355466424179 is an equidigital number, since it uses as much as digits as its factorization.

21355466424179 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43545600, while the sum is 59.

The spelling of 21355466424179 in words is "twenty-one trillion, three hundred fifty-five billion, four hundred sixty-six million, four hundred twenty-four thousand, one hundred seventy-nine".