21344251052404 has 24 divisors (see below), whose sum is σ = 42850815815808. Its totient is φ = 9112754655840.

The previous prime is 21344251052381. The next prime is 21344251052417. The reversal of 21344251052404 is 40425015244312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1449222067 + ... + 1449236794.

It is an arithmetic number, because the mean of its divisors is an integer number (1785450658992).

Almost surely, 2^{21344251052404} is an apocalyptic number.

It is an amenable number.

21344251052404 is an abundant number, since it is smaller than the sum of its proper divisors (21506564763404).

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

21344251052404 is a wasteful number, since it uses less digits than its factorization.

21344251052404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2898459135 (or 2898459133 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 21344251052404 its reverse (40425015244312), we get a palindrome (61769266296716).

The spelling of 21344251052404 in words is "twenty-one trillion, three hundred forty-four billion, two hundred fifty-one million, fifty-two thousand, four hundred four".