21440512102353 has 64 divisors (see below), whose sum is σ = 30435868108800. Its totient is φ = 13387170309120.

The previous prime is 21440512102351. The next prime is 21440512102393. The reversal of 21440512102353 is 35320121504412.

It is not a de Polignac number, because 21440512102353 - 2¹ = 21440512102351 is a prime.

It is a super-2 number, since 2×21440512102353² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21440512102351) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9653538783 + ... + 9653541003.

It is an arithmetic number, because the mean of its divisors is an integer number (475560439200).

Almost surely, 2^{21440512102353} is an apocalyptic number.

It is an amenable number.

21440512102353 is a deficient number, since it is larger than the sum of its proper divisors (8995356006447).

21440512102353 is a wasteful number, since it uses less digits than its factorization.

21440512102353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4902.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 21440512102353 its reverse (35320121504412), we get a palindrome (56760633606765).

The spelling of 21440512102353 in words is "twenty-one trillion, four hundred forty billion, five hundred twelve million, one hundred two thousand, three hundred fifty-three".