21033469744 has 80 divisors (see below), whose sum is σ = 48456073216. Its totient is φ = 8654688000.

The previous prime is 21033469693. The next prime is 21033469747. The reversal of 21033469744 is 44796433012.

It is a self number, because there is not a number n which added to its sum of digits gives 21033469744.

It is not an unprimeable number, because it can be changed into a prime (21033469747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 417094 + ... + 464794.

Almost surely, 2^21033469744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21033469744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24228036608).

21033469744 is an abundant number, since it is smaller than the sum of its proper divisors (27422603472).

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

21033469744 is a wasteful number, since it uses less digits than its factorization.

21033469744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47874 (or 47868 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 43.

The spelling of 21033469744 in words is "twenty-one billion, thirty-three million, four hundred sixty-nine thousand, seven hundred forty-four".