21035352044 has 24 divisors (see below), whose sum is σ = 42663253248. Its totient is φ = 8888176080.

The previous prime is 21035352031. The next prime is 21035352049. The reversal of 21035352044 is 44025353012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21035351998 and 21035352016.

It is not an unprimeable number, because it can be changed into a prime (21035352049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5288594 + ... + 5292569.

It is an arithmetic number, because the mean of its divisors is an integer number (1777635552).

Almost surely, 2^21035352044 is an apocalyptic number.

It is an amenable number.

21035352044 is an abundant number, since it is smaller than the sum of its proper divisors (21627901204).

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

21035352044 is a wasteful number, since it uses less digits than its factorization.

21035352044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10581245 (or 10581243 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The spelling of 21035352044 in words is "twenty-one billion, thirty-five million, three hundred fifty-two thousand, forty-four".