21404506067274 has 64 divisors (see below), whose sum is σ = 48227473612800. Its totient is φ = 6274343544000.

The previous prime is 21404506067249. The next prime is 21404506067293. The reversal of 21404506067274 is 47276060540412.

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, 2674627 + ... + 7068425.

It is an arithmetic number, because the mean of its divisors is an integer number (753554275200).

Almost surely, 2^{21404506067274} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21404506067274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24113736806400).

21404506067274 is an abundant number, since it is smaller than the sum of its proper divisors (26822967545526).

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

21404506067274 is a wasteful number, since it uses less digits than its factorization.

21404506067274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4396227.

The product of its (nonzero) digits is 2257920, while the sum is 48.

The spelling of 21404506067274 in words is "twenty-one trillion, four hundred four billion, five hundred six million, sixty-seven thousand, two hundred seventy-four".