20471145311 has 4 divisors (see below), whose sum is σ = 20476943112. Its totient is φ = 20465347512.

The previous prime is 20471145287. The next prime is 20471145329. The reversal of 20471145311 is 11354117402.

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 20471145311 - 2²⁶ = 20404036447 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 (20471145011) 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, 2893601 + ... + 2900666.

It is an arithmetic number, because the mean of its divisors is an integer number (5119235778).

Almost surely, 2^20471145311 is an apocalyptic number.

20471145311 is a deficient number, since it is larger than the sum of its proper divisors (5797801).

20471145311 is an equidigital number, since it uses as much as digits as its factorization.

20471145311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5797800.

The product of its (nonzero) digits is 3360, while the sum is 29.

The spelling of 20471145311 in words is "twenty billion, four hundred seventy-one million, one hundred forty-five thousand, three hundred eleven".