21415382075904 has 80 divisors (see below), whose sum is σ = 60054648830880. Its totient is φ = 6762752225280.

The previous prime is 21415382075881. The next prime is 21415382075921. The reversal of 21415382075904 is 40957028351412.

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, 366873607 + ... + 366931974.

It is an arithmetic number, because the mean of its divisors is an integer number (750683110386).

Almost surely, 2^{21415382075904} is an apocalyptic number.

21415382075904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21415382075904 is an abundant number, since it is smaller than the sum of its proper divisors (38639266754976).

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

21415382075904 is an equidigital number, since it uses as much as digits as its factorization.

21415382075904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733805621 (or 733805605 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 21415382075904 in words is "twenty-one trillion, four hundred fifteen billion, three hundred eighty-two million, seventy-five thousand, nine hundred four".