21044469867 has 8 divisors (see below), whose sum is σ = 28102933824. Its totient is φ = 14007826248.

The previous prime is 21044469839. The next prime is 21044469899. The reversal of 21044469867 is 76896444012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21044469867 - 2¹¹ = 21044467819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21044469767) 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, 5452833 + ... + 5456690.

It is an arithmetic number, because the mean of its divisors is an integer number (3512866728).

Almost surely, 2^21044469867 is an apocalyptic number.

21044469867 is a deficient number, since it is larger than the sum of its proper divisors (7058463957).

21044469867 is a wasteful number, since it uses less digits than its factorization.

21044469867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10910169.

The product of its (nonzero) digits is 2322432, while the sum is 51.

The spelling of 21044469867 in words is "twenty-one billion, forty-four million, four hundred sixty-nine thousand, eight hundred sixty-seven".