20127266471 has 4 divisors (see below), whose sum is σ = 21675517752. Its totient is φ = 18579015192.

The previous prime is 20127266449. The next prime is 20127266477. The reversal of 20127266471 is 17466272102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20127266471 is a prime.

It is a super-3 number, since 3×20127266471³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20127266477) 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, 774125621 + ... + 774125646.

It is an arithmetic number, because the mean of its divisors is an integer number (5418879438).

Almost surely, 2^20127266471 is an apocalyptic number.

20127266471 is a deficient number, since it is larger than the sum of its proper divisors (1548251281).

20127266471 is a wasteful number, since it uses less digits than its factorization.

20127266471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548251280.

The product of its (nonzero) digits is 56448, while the sum is 38.

The spelling of 20127266471 in words is "twenty billion, one hundred twenty-seven million, two hundred sixty-six thousand, four hundred seventy-one".