20443020240 has 160 divisors (see below), whose sum is σ = 64217246976. Its totient is φ = 5379379200.

The previous prime is 20443020233. The next prime is 20443020259. The reversal of 20443020240 is 4202034402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5687884 + ... + 5691476.

Almost surely, 2^20443020240 is an apocalyptic number.

20443020240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20443020240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32108623488).

20443020240 is an abundant number, since it is smaller than the sum of its proper divisors (43774226736).

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

20443020240 is a wasteful number, since it uses less digits than its factorization.

20443020240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3917 (or 3911 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

Adding to 20443020240 its reverse (4202034402), we get a palindrome (24645054642).

The spelling of 20443020240 in words is "twenty billion, four hundred forty-three million, twenty thousand, two hundred forty".