20164543563 has 16 divisors (see below), whose sum is σ = 27001318176. Its totient is φ = 13385441280.

The previous prime is 20164543541. The next prime is 20164543571. The reversal of 20164543563 is 36534546102.

It is not a de Polignac number, because 20164543563 - 2¹⁰ = 20164542539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20164563563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3461193 + ... + 3467013.

It is an arithmetic number, because the mean of its divisors is an integer number (1687582386).

Almost surely, 2^20164543563 is an apocalyptic number.

20164543563 is a deficient number, since it is larger than the sum of its proper divisors (6836774613).

20164543563 is a wasteful number, since it uses less digits than its factorization.

20164543563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10574.

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 20164543563 in words is "twenty billion, one hundred sixty-four million, five hundred forty-three thousand, five hundred sixty-three".