20538387144159 has 4 divisors (see below), whose sum is σ = 27384516192216. Its totient is φ = 13692258096104.

The previous prime is 20538387144133. The next prime is 20538387144181. The reversal of 20538387144159 is 95144178383502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20538387144159 - 2¹⁵ = 20538387111391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20538387144959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3423064524024 + ... + 3423064524029.

It is an arithmetic number, because the mean of its divisors is an integer number (6846129048054).

Almost surely, 2^{20538387144159} is an apocalyptic number.

20538387144159 is a deficient number, since it is larger than the sum of its proper divisors (6846129048057).

20538387144159 is an equidigital number, since it uses as much as digits as its factorization.

20538387144159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6846129048056.

The product of its (nonzero) digits is 29030400, while the sum is 60.

The spelling of 20538387144159 in words is "twenty trillion, five hundred thirty-eight billion, three hundred eighty-seven million, one hundred forty-four thousand, one hundred fifty-nine".