20545623071 has 8 divisors (see below), whose sum is σ = 21879939024. Its totient is φ = 19225279360.

The previous prime is 20545623013. The next prime is 20545623143. The reversal of 20545623071 is 17032654502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20545623071 - 2¹⁴ = 20545606687 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 (20545653071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3490025 + ... + 3495906.

It is an arithmetic number, because the mean of its divisors is an integer number (2734992378).

Almost surely, 2^20545623071 is an apocalyptic number.

20545623071 is a deficient number, since it is larger than the sum of its proper divisors (1334315953).

20545623071 is a wasteful number, since it uses less digits than its factorization.

20545623071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6986121.

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 20545623071 in words is "twenty billion, five hundred forty-five million, six hundred twenty-three thousand, seventy-one".