20365443072 has 264 divisors, whose sum is σ = 64122504264. Its totient is φ = 6190792704.

The previous prime is 20365443047. The next prime is 20365443073. The reversal of 20365443072 is 27034456302.

20365443072 is a `hidden beast` number, since 203 + 6 + 5 + 443 + 0 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20365443073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 245366743 + ... + 245366825.

Almost surely, 2^20365443072 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 20365443072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32061252132).

20365443072 is an abundant number, since it is smaller than the sum of its proper divisors (43757061192).

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

20365443072 is an frugal number, since it uses more digits than its factorization.

20365443072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 36.

Adding to 20365443072 its reverse (27034456302), we get a palindrome (47399899374).

The spelling of 20365443072 in words is "twenty billion, three hundred sixty-five million, four hundred forty-three thousand, seventy-two".