20140742777671 has 4 divisors (see below), whose sum is σ = 20153661793200. Its totient is φ = 20127823762144.

The previous prime is 20140742777609. The next prime is 20140742777711. The reversal of 20140742777671 is 17677724704102.

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 20140742777671 - 2¹¹ = 20140742775623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20140742778671) 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, 6459505426 + ... + 6459508543.

It is an arithmetic number, because the mean of its divisors is an integer number (5038415448300).

Almost surely, 2^{20140742777671} is an apocalyptic number.

20140742777671 is a deficient number, since it is larger than the sum of its proper divisors (12919015529).

20140742777671 is a wasteful number, since it uses less digits than its factorization.

20140742777671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12919015528.

The product of its (nonzero) digits is 6453888, while the sum is 55.

The spelling of 20140742777671 in words is "twenty trillion, one hundred forty billion, seven hundred forty-two million, seven hundred seventy-seven thousand, six hundred seventy-one".