20015256332271 has 4 divisors (see below), whose sum is σ = 26687008443032. Its totient is φ = 13343504221512.

The previous prime is 20015256332249. The next prime is 20015256332303. The reversal of 20015256332271 is 17223365251002.

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

It is not a de Polignac number, because 20015256332271 - 2³⁹ = 19465500518383 is a prime.

It is a super-2 number, since 2×20015256332271² (a number of 27 digits) contains 22 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 (20015256332221) 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, 3335876055376 + ... + 3335876055381.

It is an arithmetic number, because the mean of its divisors is an integer number (6671752110758).

Almost surely, 2^{20015256332271} is an apocalyptic number.

20015256332271 is a deficient number, since it is larger than the sum of its proper divisors (6671752110761).

20015256332271 is an equidigital number, since it uses as much as digits as its factorization.

20015256332271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6671752110760.

The product of its (nonzero) digits is 151200, while the sum is 39.

The spelling of 20015256332271 in words is "twenty trillion, fifteen billion, two hundred fifty-six million, three hundred thirty-two thousand, two hundred seventy-one".