20143440240 has 160 divisors (see below), whose sum is σ = 77853159936. Its totient is φ = 4185646080.

The previous prime is 20143440173. The next prime is 20143440241. The reversal of 20143440240 is 4204434102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20143440240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20143440241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 526527 + ... + 563486.

Almost surely, 2^20143440240 is an apocalyptic number.

20143440240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20143440240 is an abundant number, since it is smaller than the sum of its proper divisors (57709719696).

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

20143440240 is a wasteful number, since it uses less digits than its factorization.

20143440240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090047 (or 1090041 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20143440240 its reverse (4204434102), we get a palindrome (24347874342).

The spelling of 20143440240 in words is "twenty billion, one hundred forty-three million, four hundred forty thousand, two hundred forty".