20440471067 has 4 divisors (see below), whose sum is σ = 21642851736. Its totient is φ = 19238090400.

The previous prime is 20440471027. The next prime is 20440471133. The reversal of 20440471067 is 76017404402.

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 20440471067 - 2²⁰ = 20439422491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20440471027) 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, 601190309 + ... + 601190342.

It is an arithmetic number, because the mean of its divisors is an integer number (5410712934).

Almost surely, 2^20440471067 is an apocalyptic number.

20440471067 is a deficient number, since it is larger than the sum of its proper divisors (1202380669).

20440471067 is a wasteful number, since it uses less digits than its factorization.

20440471067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202380668.

The product of its (nonzero) digits is 37632, while the sum is 35.

Adding to 20440471067 its reverse (76017404402), we get a palindrome (96457875469).

The spelling of 20440471067 in words is "twenty billion, four hundred forty million, four hundred seventy-one thousand, sixty-seven".