20203440000000 has 352 divisors, whose sum is σ = 67312544085696. Its totient is φ = 5387520000000.

The previous prime is 20203439999893. The next prime is 20203440000001. The reversal of 20203440000000 is 4430202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (20203440000001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 239957910 + ... + 240042090.

Almost surely, 2^{20203440000000} is an apocalyptic number.

20203440000000 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 20203440000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33656272042848).

20203440000000 is an abundant number, since it is smaller than the sum of its proper divisors (47109104085696).

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

20203440000000 is an frugal number, since it uses more digits than its factorization.

20203440000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84239 (or 84191 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

Adding to 20203440000000 its reverse (4430202), we get a palindrome (20203444430202).

The spelling of 20203440000000 in words is "twenty trillion, two hundred three billion, four hundred forty million", and thus it is an aban number.