201423440000 has 160 divisors (see below), whose sum is σ = 508928653200. Its totient is φ = 79364736000.

The previous prime is 201423439981. The next prime is 201423440003. The reversal of 201423440000 is 44324102.

It is a tau number, because it is divible by the number of its divisors (160).

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 (201423440003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5341211 + ... + 5378789.

Almost surely, 2^201423440000 is an apocalyptic number.

201423440000 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 201423440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254464326600).

201423440000 is an abundant number, since it is smaller than the sum of its proper divisors (307505213200).

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

201423440000 is an frugal number, since it uses more digits than its factorization.

201423440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37680 (or 37653 counting only the distinct ones).

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

Adding to 201423440000 its reverse (44324102), we get a palindrome (201467764102).

The spelling of 201423440000 in words is "two hundred one billion, four hundred twenty-three million, four hundred forty thousand".