20135143522512 has 120 divisors (see below), whose sum is σ = 58126147038440. Its totient is φ = 6501799756800.

The previous prime is 20135143522511. The next prime is 20135143522589. The reversal of 20135143522512 is 21522534153102.

20135143522512 is a `hidden beast` number, since 2 + 0 + 1 + 3 + 51 + 4 + 352 + 251 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11196813514896 + 8938330007616 = 3346164^2 + 2989704^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135143522511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7031239 + ... + 9471462.

Almost surely, 2^{20135143522512} is an apocalyptic number.

It is an amenable number.

20135143522512 is an abundant number, since it is smaller than the sum of its proper divisors (37991003515928).

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

20135143522512 is a wasteful number, since it uses less digits than its factorization.

20135143522512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16502981 (or 16502972 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 20135143522512 its reverse (21522534153102), we get a palindrome (41657677675614).

The spelling of 20135143522512 in words is "twenty trillion, one hundred thirty-five billion, one hundred forty-three million, five hundred twenty-two thousand, five hundred twelve".