21035443351 has 12 divisors (see below), whose sum is σ = 23307754008. Its totient is φ = 18965759904.

The previous prime is 21035443307. The next prime is 21035443379. The reversal of 21035443351 is 15334453012.

It is not a de Polignac number, because 21035443351 - 2⁷ = 21035443223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21035473351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1440060 + ... + 1454593.

It is an arithmetic number, because the mean of its divisors is an integer number (1942312834).

Almost surely, 2^21035443351 is an apocalyptic number.

21035443351 is a deficient number, since it is larger than the sum of its proper divisors (2272310657).

21035443351 is a wasteful number, since it uses less digits than its factorization.

21035443351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2894722 (or 2894709 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 21035443351 its reverse (15334453012), we get a palindrome (36369896363).

The spelling of 21035443351 in words is "twenty-one billion, thirty-five million, four hundred forty-three thousand, three hundred fifty-one".