20127174671551 has 8 divisors (see below), whose sum is σ = 21017565882720. Its totient is φ = 19238058182112.

The previous prime is 20127174671533. The next prime is 20127174671557. The reversal of 20127174671551 is 15517647172102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20127174671551 - 2¹⁷ = 20127174540479 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20127174671495 and 20127174671504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20127174671557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318648156 + ... + 318711313.

It is an arithmetic number, because the mean of its divisors is an integer number (2627195735340).

Almost surely, 2^{20127174671551} is an apocalyptic number.

20127174671551 is a deficient number, since it is larger than the sum of its proper divisors (890391211169).

20127174671551 is a wasteful number, since it uses less digits than its factorization.

20127174671551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637360865.

The product of its (nonzero) digits is 823200, while the sum is 49.

The spelling of 20127174671551 in words is "twenty trillion, one hundred twenty-seven billion, one hundred seventy-four million, six hundred seventy-one thousand, five hundred fifty-one".