20135303601240 has 128 divisors (see below), whose sum is σ = 61733625845760. Its totient is φ = 5251552525824.

The previous prime is 20135303601229. The next prime is 20135303601241. The reversal of 20135303601240 is 4210630353102.

It is a super-2 number, since 2×20135303601240² (a number of 27 digits) contains 22 as substring.

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 = 20135303601198 and 20135303601207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135303601241) 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, 6966397 + ... + 9423443.

It is an arithmetic number, because the mean of its divisors is an integer number (482293951920).

Almost surely, 2^{20135303601240} is an apocalyptic number.

20135303601240 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 20135303601240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30866812922880).

20135303601240 is an abundant number, since it is smaller than the sum of its proper divisors (41598322244520).

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

20135303601240 is a wasteful number, since it uses less digits than its factorization.

20135303601240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458561 (or 2458557 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 20135303601240 its reverse (4210630353102), we get a palindrome (24345933954342).

The spelling of 20135303601240 in words is "twenty trillion, one hundred thirty-five billion, three hundred three million, six hundred one thousand, two hundred forty".