20135105767240 has 64 divisors (see below), whose sum is σ = 45594628326000. Its totient is φ = 8002377596928.

The previous prime is 20135105767109. The next prime is 20135105767247. The reversal of 20135105767240 is 4276750153102.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 8761848641764 + 11373257125476 = 2960042^2 + 3372426^2 .

It is not an unprimeable number, because it can be changed into a prime (20135105767247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168552012 + ... + 168671428.

Almost surely, 2^{20135105767240} is an apocalyptic number.

20135105767240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20135105767240 is an abundant number, since it is smaller than the sum of its proper divisors (25459522558760).

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

20135105767240 is a wasteful number, since it uses less digits than its factorization.

20135105767240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146434 (or 146430 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 43.

The spelling of 20135105767240 in words is "twenty trillion, one hundred thirty-five billion, one hundred five million, seven hundred sixty-seven thousand, two hundred forty".