21432064504642 has 16 divisors (see below), whose sum is σ = 35090888029632. Its totient is φ = 9736226107120.

The previous prime is 21432064504589. The next prime is 21432064504757. The reversal of 21432064504642 is 24640546023412.

It is a super-3 number, since 3×21432064504642³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281030758 + ... + 281107009.

It is an arithmetic number, because the mean of its divisors is an integer number (2193180501852).

Almost surely, 2^{21432064504642} is an apocalyptic number.

21432064504642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21432064504642 is a deficient number, since it is larger than the sum of its proper divisors (13658823524990).

21432064504642 is a wasteful number, since it uses less digits than its factorization.

21432064504642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562139513.

The product of its (nonzero) digits is 1105920, while the sum is 43.

The spelling of 21432064504642 in words is "twenty-one trillion, four hundred thirty-two billion, sixty-four million, five hundred four thousand, six hundred forty-two".