21343406163 has 32 divisors (see below), whose sum is σ = 30787645440. Its totient is φ = 13113429120.

The previous prime is 21343406141. The next prime is 21343406179. The reversal of 21343406163 is 36160434312.

It is not a de Polignac number, because 21343406163 - 2⁵ = 21343406131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21343406263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 468045 + ... + 511617.

It is an arithmetic number, because the mean of its divisors is an integer number (962113920).

Almost surely, 2^21343406163 is an apocalyptic number.

21343406163 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21343406163 is a deficient number, since it is larger than the sum of its proper divisors (9444239277).

21343406163 is a wasteful number, since it uses less digits than its factorization.

21343406163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43859.

The product of its (nonzero) digits is 31104, while the sum is 33.

The spelling of 21343406163 in words is "twenty-one billion, three hundred forty-three million, four hundred six thousand, one hundred sixty-three".