21243034004334 has 8 divisors (see below), whose sum is σ = 42486068008680. Its totient is φ = 7081011334776.

The previous prime is 21243034004321. The next prime is 21243034004383. The reversal of 21243034004334 is 43340043034212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

21243034004334 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21243034004295 and 21243034004304.

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, 1770252833689 + ... + 1770252833700.

It is an arithmetic number, because the mean of its divisors is an integer number (5310758501085).

Almost surely, 2^{21243034004334} is an apocalyptic number.

21243034004334 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21243034004334 is a wasteful number, since it uses less digits than its factorization.

21243034004334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3540505667394.

The product of its (nonzero) digits is 82944, while the sum is 33.

Adding to 21243034004334 its reverse (43340043034212), we get a palindrome (64583077038546).

The spelling of 21243034004334 in words is "twenty-one trillion, two hundred forty-three billion, thirty-four million, four thousand, three hundred thirty-four".