20443134001240 has 32 divisors (see below), whose sum is σ = 45999696425760. Its totient is φ = 8176783392000.

The previous prime is 20443134001217. The next prime is 20443134001249. The reversal of 20443134001240 is 4210043134402.

It is a junction number, because it is equal to n+sod(n) for n = 20443134001199 and 20443134001208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443134001249) 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, 13989276 + ... + 15381355.

It is an arithmetic number, because the mean of its divisors is an integer number (1437490513305).

Almost surely, 2^{20443134001240} is an apocalyptic number.

20443134001240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20443134001240 is an abundant number, since it is smaller than the sum of its proper divisors (25556562424520).

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

20443134001240 is a wasteful number, since it uses less digits than its factorization.

20443134001240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29388043 (or 29388039 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20443134001240 its reverse (4210043134402), we get a palindrome (24653177135642).

The spelling of 20443134001240 in words is "twenty trillion, four hundred forty-three billion, one hundred thirty-four million, one thousand, two hundred forty".