21424804608378 has 16 divisors (see below), whose sum is σ = 42850196776800. Its totient is φ = 7141503609456.

The previous prime is 21424804608373. The next prime is 21424804608379. The reversal of 21424804608378 is 87380640842412.

It is not an unprimeable number, because it can be changed into a prime (21424804608373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24006928 + ... + 24883371.

It is an arithmetic number, because the mean of its divisors is an integer number (2678137298550).

Almost surely, 2^{21424804608378} is an apocalyptic number.

21424804608378 is an abundant number, since it is smaller than the sum of its proper divisors (21425392168422).

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

21424804608378 is a wasteful number, since it uses less digits than its factorization.

21424804608378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48963341.

The product of its (nonzero) digits is 16515072, while the sum is 57.

The spelling of 21424804608378 in words is "twenty-one trillion, four hundred twenty-four billion, eight hundred four million, six hundred eight thousand, three hundred seventy-eight".