20744440216 has 8 divisors (see below), whose sum is σ = 38895825420. Its totient is φ = 10372220104.

The previous prime is 20744440193. The next prime is 20744440253. The reversal of 20744440216 is 61204444702.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1296527506 + ... + 1296527521.

Almost surely, 2^20744440216 is an apocalyptic number.

It is an amenable number.

20744440216 is a deficient number, since it is larger than the sum of its proper divisors (18151385204).

20744440216 is a wasteful number, since it uses less digits than its factorization.

20744440216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2593055033 (or 2593055029 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 34.

Adding to 20744440216 its reverse (61204444702), we get a palindrome (81948884918).

The spelling of 20744440216 in words is "twenty billion, seven hundred forty-four million, four hundred forty thousand, two hundred sixteen".