21073008572168 has 32 divisors (see below), whose sum is σ = 46078007088000. Its totient is φ = 9031289386896.

The previous prime is 21073008572167. The next prime is 21073008572173. The reversal of 21073008572168 is 86127580037012.

It is not an unprimeable number, because it can be changed into a prime (21073008572167) by changing a digit.

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, 3839831180 + ... + 3839836667.

It is an arithmetic number, because the mean of its divisors is an integer number (1439937721500).

Almost surely, 2^{21073008572168} is an apocalyptic number.

21073008572168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21073008572168 is an abundant number, since it is smaller than the sum of its proper divisors (25004998515832).

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

21073008572168 is an equidigital number, since it uses as much as digits as its factorization.

21073008572168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7679667874 (or 7679667856 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 21073008572168 in words is "twenty-one trillion, seventy-three billion, eight million, five hundred seventy-two thousand, one hundred sixty-eight".