20543343466 has 16 divisors (see below), whose sum is σ = 32073184800. Its totient is φ = 9856628208.

The previous prime is 20543343451. The next prime is 20543343479. The reversal of 20543343466 is 66434334502.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1077036 + ... + 1095943.

It is an arithmetic number, because the mean of its divisors is an integer number (2004574050).

Almost surely, 2^20543343466 is an apocalyptic number.

20543343466 is a deficient number, since it is larger than the sum of its proper divisors (11529841334).

20543343466 is a wasteful number, since it uses less digits than its factorization.

20543343466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2173173.

The product of its (nonzero) digits is 622080, while the sum is 40.

Adding to 20543343466 its reverse (66434334502), we get a palindrome (86977677968).

The spelling of 20543343466 in words is "twenty billion, five hundred forty-three million, three hundred forty-three thousand, four hundred sixty-six".