20135144617874 has 64 divisors (see below), whose sum is σ = 35564591462400. Its totient is φ = 8428881384000.

The previous prime is 20135144617871. The next prime is 20135144617949. The reversal of 20135144617874 is 47871644153102.

It is not an unprimeable number, because it can be changed into a prime (20135144617871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 305512577 + ... + 305578475.

It is an arithmetic number, because the mean of its divisors is an integer number (555696741600).

Almost surely, 2^{20135144617874} is an apocalyptic number.

20135144617874 is a deficient number, since it is larger than the sum of its proper divisors (15429446844526).

20135144617874 is a wasteful number, since it uses less digits than its factorization.

20135144617874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68367.

The product of its (nonzero) digits is 4515840, while the sum is 53.

The spelling of 20135144617874 in words is "twenty trillion, one hundred thirty-five billion, one hundred forty-four million, six hundred seventeen thousand, eight hundred seventy-four".