20135142752257 has 16 divisors (see below), whose sum is σ = 21748840206912. Its totient is φ = 18530775639360.

The previous prime is 20135142752243. The next prime is 20135142752303. The reversal of 20135142752257 is 75225724153102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20135142752257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20135142752227) 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, 5765698 + ... + 8574004.

It is an arithmetic number, because the mean of its divisors is an integer number (1359302512932).

Almost surely, 2^{20135142752257} is an apocalyptic number.

It is an amenable number.

20135142752257 is a deficient number, since it is larger than the sum of its proper divisors (1613697454655).

20135142752257 is a wasteful number, since it uses less digits than its factorization.

20135142752257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2809968.

The product of its (nonzero) digits is 1176000, while the sum is 46.

The spelling of 20135142752257 in words is "twenty trillion, one hundred thirty-five billion, one hundred forty-two million, seven hundred fifty-two thousand, two hundred fifty-seven".