20204031440000 has 80 divisors (see below), whose sum is σ = 50296673717070. Its totient is φ = 8081612544000.

The previous prime is 20204031439901. The next prime is 20204031440009. The reversal of 20204031440000 is 4413040202.

It can be written as a sum of positive squares in 5 ways, for example, as 1001616652864 + 19202414787136 = 1000808^2 + 4382056^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (20204031440009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 126195197 + ... + 126355196.

Almost surely, 2^{20204031440000} is an apocalyptic number.

20204031440000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20204031440000 is an abundant number, since it is smaller than the sum of its proper divisors (30092642277070).

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

20204031440000 is an frugal number, since it uses more digits than its factorization.

20204031440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252550427 (or 252550400 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20204031440000 its reverse (4413040202), we get a palindrome (20208444480202).

The spelling of 20204031440000 in words is "twenty trillion, two hundred four billion, thirty-one million, four hundred forty thousand".