20050130542440 has 128 divisors (see below), whose sum is σ = 60187111845120. Its totient is φ = 5343438643200.

The previous prime is 20050130542399. The next prime is 20050130542447. The reversal of 20050130542440 is 4424503105002.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20050130542398 and 20050130542407.

It is not an unprimeable number, because it can be changed into a prime (20050130542447) 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, 2016907870 + ... + 2016917810.

It is an arithmetic number, because the mean of its divisors is an integer number (470211811290).

Almost surely, 2^{20050130542440} is an apocalyptic number.

20050130542440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20050130542440 is an abundant number, since it is smaller than the sum of its proper divisors (40136981302680).

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

20050130542440 is a wasteful number, since it uses less digits than its factorization.

20050130542440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18523 (or 18519 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 20050130542440 its reverse (4424503105002), we get a palindrome (24474633647442).

The spelling of 20050130542440 in words is "twenty trillion, fifty billion, one hundred thirty million, five hundred forty-two thousand, four hundred forty".