21601667303242 has 16 divisors (see below), whose sum is σ = 34897212054432. Its totient is φ = 9969368572080.

The previous prime is 21601667303219. The next prime is 21601667303257. The reversal of 21601667303242 is 24230376610612.

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, 25903384 + ... + 26724307.

It is an arithmetic number, because the mean of its divisors is an integer number (2181075753402).

Almost surely, 2^{21601667303242} is an apocalyptic number.

21601667303242 is a deficient number, since it is larger than the sum of its proper divisors (13295544751190).

21601667303242 is a wasteful number, since it uses less digits than its factorization.

21601667303242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52643493.

The product of its (nonzero) digits is 435456, while the sum is 43.

The spelling of 21601667303242 in words is "twenty-one trillion, six hundred one billion, six hundred sixty-seven million, three hundred three thousand, two hundred forty-two".