20013240455271 has 96 divisors (see below), whose sum is σ = 35425610297280. Its totient is φ = 11125949571072.

The previous prime is 20013240455267. The next prime is 20013240455287. The reversal of 20013240455271 is 17255404231002.

20013240455271 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 32 + 4 + 0 + 4 + 552 + 71 = 666.

It is not a de Polignac number, because 20013240455271 - 2² = 20013240455267 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013240455251) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 925799455 + ... + 925821071.

It is an arithmetic number, because the mean of its divisors is an integer number (369016773930).

Almost surely, 2^{20013240455271} is an apocalyptic number.

20013240455271 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20013240455271 is a deficient number, since it is larger than the sum of its proper divisors (15412369842009).

20013240455271 is a wasteful number, since it uses less digits than its factorization.

20013240455271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40590 (or 40577 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

Adding to 20013240455271 its reverse (17255404231002), we get a palindrome (37268644686273).

The spelling of 20013240455271 in words is "twenty trillion, thirteen billion, two hundred forty million, four hundred fifty-five thousand, two hundred seventy-one".