21253334010344 has 64 divisors (see below), whose sum is σ = 41320340136000. Its totient is φ = 10240568930304.

The previous prime is 21253334010299. The next prime is 21253334010347. The reversal of 21253334010344 is 44301043335212.

It is not an unprimeable number, because it can be changed into a prime (21253334010347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12148607 + ... + 13787505.

It is an arithmetic number, because the mean of its divisors is an integer number (645630314625).

Almost surely, 2^{21253334010344} is an apocalyptic number.

It is an amenable number.

21253334010344 is a deficient number, since it is larger than the sum of its proper divisors (20067006125656).

21253334010344 is a wasteful number, since it uses less digits than its factorization.

21253334010344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639362 (or 1639358 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 35.

Adding to 21253334010344 its reverse (44301043335212), we get a palindrome (65554377345556).

The spelling of 21253334010344 in words is "twenty-one trillion, two hundred fifty-three billion, three hundred thirty-four million, ten thousand, three hundred forty-four".