20040042104120 has 128 divisors (see below), whose sum is σ = 47140606540800. Its totient is φ = 7652825005056.

The previous prime is 20040042104101. The next prime is 20040042104123. The reversal of 20040042104120 is 2140124004002.

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

It is a junction number, because it is equal to n+sod(n) for n = 20040042104092 and 20040042104101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20040042104123) 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, 2392265372 + ... + 2392273748.

It is an arithmetic number, because the mean of its divisors is an integer number (368285988600).

Almost surely, 2^{20040042104120} is an apocalyptic number.

20040042104120 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 20040042104120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23570303270400).

20040042104120 is an abundant number, since it is smaller than the sum of its proper divisors (27100564436680).

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

20040042104120 is a wasteful number, since it uses less digits than its factorization.

20040042104120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13077 (or 13073 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20040042104120 its reverse (2140124004002), we get a palindrome (22180166108122).

The spelling of 20040042104120 in words is "twenty trillion, forty billion, forty-two million, one hundred four thousand, one hundred twenty".