21168607466442 has 16 divisors (see below), whose sum is σ = 43321801327200. Its totient is φ = 6892104756432.

The previous prime is 21168607466431. The next prime is 21168607466459. The reversal of 21168607466442 is 24466470686112.

It is a super-2 number, since 2×21168607466442² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41024432817 + ... + 41024433332.

It is an arithmetic number, because the mean of its divisors is an integer number (2707612582950).

Almost surely, 2^{21168607466442} is an apocalyptic number.

21168607466442 is an abundant number, since it is smaller than the sum of its proper divisors (22153193860758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21168607466442 is a wasteful number, since it uses less digits than its factorization.

21168607466442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82048866197.

The product of its (nonzero) digits is 18579456, while the sum is 57.

The spelling of 21168607466442 in words is "twenty-one trillion, one hundred sixty-eight billion, six hundred seven million, four hundred sixty-six thousand, four hundred forty-two".