20450520141240 has 256 divisors, whose sum is σ = 71058995712000. Its totient is φ = 4611635159040.

The previous prime is 20450520141239. The next prime is 20450520141269. The reversal of 20450520141240 is 4214102505402.

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 = 20450520141198 and 20450520141207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 85418500 + ... + 85657580.

It is an arithmetic number, because the mean of its divisors is an integer number (277574202000).

Almost surely, 2^{20450520141240} is an apocalyptic number.

20450520141240 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 20450520141240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35529497856000).

20450520141240 is an abundant number, since it is smaller than the sum of its proper divisors (50608475570760).

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

20450520141240 is a wasteful number, since it uses less digits than its factorization.

20450520141240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240470 (or 240466 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 20450520141240 its reverse (4214102505402), we get a palindrome (24664622646642).

The spelling of 20450520141240 in words is "twenty trillion, four hundred fifty billion, five hundred twenty million, one hundred forty-one thousand, two hundred forty".