21035214444 has 12 divisors (see below), whose sum is σ = 49082167064. Its totient is φ = 7011738144.

The previous prime is 21035214437. The next prime is 21035214463. The reversal of 21035214444 is 44441253012.

It is a tau number, because it is divible by the number of its divisors (12).

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, 876467257 + ... + 876467280.

Almost surely, 2^21035214444 is an apocalyptic number.

It is an amenable number.

21035214444 is an abundant number, since it is smaller than the sum of its proper divisors (28046952620).

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

21035214444 is a wasteful number, since it uses less digits than its factorization.

21035214444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752934544 (or 1752934542 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 21035214444 its reverse (44441253012), we get a palindrome (65476467456).

The spelling of 21035214444 in words is "twenty-one billion, thirty-five million, two hundred fourteen thousand, four hundred forty-four".