21065328901008 has 160 divisors (see below), whose sum is σ = 69647316254720. Its totient is φ = 5971274225280.

The previous prime is 21065328900989. The next prime is 21065328901027. The reversal of 21065328901008 is 80010982356012.

21065328901008 is a `hidden beast` number, since 2 + 1 + 0 + 6 + 532 + 8 + 9 + 0 + 100 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (21065328900989) and next prime (21065328901027).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27041338 + ... + 27809433.

It is an arithmetic number, because the mean of its divisors is an integer number (435295726592).

Almost surely, 2^{21065328901008} is an apocalyptic number.

21065328901008 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21065328901008 is an abundant number, since it is smaller than the sum of its proper divisors (48581987353712).

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

21065328901008 is a wasteful number, since it uses less digits than its factorization.

21065328901008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54850922 (or 54850910 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 21065328901008 in words is "twenty-one trillion, sixty-five billion, three hundred twenty-eight million, nine hundred one thousand, eight".