20042343040 has 128 divisors (see below), whose sum is σ = 50937984000. Its totient is φ = 7519334400.

The previous prime is 20042343023. The next prime is 20042343071. The reversal of 20042343040 is 4034324002.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1220001 + ... + 1236319.

It is an arithmetic number, because the mean of its divisors is an integer number (397953000).

Almost surely, 2^20042343040 is an apocalyptic number.

20042343040 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 20042343040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25468992000).

20042343040 is an abundant number, since it is smaller than the sum of its proper divisors (30895640960).

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

20042343040 is a wasteful number, since it uses less digits than its factorization.

20042343040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16458 (or 16446 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 20042343040 its reverse (4034324002), we get a palindrome (24076667042).

The spelling of 20042343040 in words is "twenty billion, forty-two million, three hundred forty-three thousand, forty".