20384536811 has 4 divisors (see below), whose sum is σ = 20469828000. Its totient is φ = 20299245624.

The previous prime is 20384536801. The next prime is 20384536813. The reversal of 20384536811 is 11863548302.

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 20384536811 - 2⁶ = 20384536747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20384536813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42645236 + ... + 42645713.

It is an arithmetic number, because the mean of its divisors is an integer number (5117457000).

Almost surely, 2^20384536811 is an apocalyptic number.

20384536811 is a deficient number, since it is larger than the sum of its proper divisors (85291189).

20384536811 is an equidigital number, since it uses as much as digits as its factorization.

20384536811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85291188.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 20384536811 in words is "twenty billion, three hundred eighty-four million, five hundred thirty-six thousand, eight hundred eleven".