20804535089 has 16 divisors (see below), whose sum is σ = 23612769600. Its totient is φ = 18171314496.

The previous prime is 20804535079. The next prime is 20804535097. The reversal of 20804535089 is 98053540802.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20804535089 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20804535079) 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, 153962 + ... + 255564.

It is an arithmetic number, because the mean of its divisors is an integer number (1475798100).

Almost surely, 2^20804535089 is an apocalyptic number.

It is an amenable number.

20804535089 is a deficient number, since it is larger than the sum of its proper divisors (2808234511).

20804535089 is a wasteful number, since it uses less digits than its factorization.

20804535089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102464.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 20804535089 in words is "twenty billion, eight hundred four million, five hundred thirty-five thousand, eighty-nine".