21452351113204 has 12 divisors (see below), whose sum is σ = 40954488488928. Its totient is φ = 9751068687800.

The previous prime is 21452351113189. The next prime is 21452351113211. The reversal of 21452351113204 is 40231115325412.

It is a self number, because there is not a number n which added to its sum of digits gives 21452351113204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243776717152 + ... + 243776717239.

It is an arithmetic number, because the mean of its divisors is an integer number (3412874040744).

Almost surely, 2^{21452351113204} is an apocalyptic number.

It is an amenable number.

21452351113204 is a deficient number, since it is larger than the sum of its proper divisors (19502137375724).

21452351113204 is a wasteful number, since it uses less digits than its factorization.

21452351113204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487553434406 (or 487553434404 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 21452351113204 its reverse (40231115325412), we get a palindrome (61683466438616).

The spelling of 21452351113204 in words is "twenty-one trillion, four hundred fifty-two billion, three hundred fifty-one million, one hundred thirteen thousand, two hundred four".