20264786809 has 8 divisors (see below), whose sum is σ = 20465894592. Its totient is φ = 20063763120.

The previous prime is 20264786803. The next prime is 20264786827. The reversal of 20264786809 is 90868746202.

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 20264786809 - 2¹⁷ = 20264655737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20264786803) 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 7 ways as a sum of consecutive naturals, for example, 535962 + ... + 572524.

It is an arithmetic number, because the mean of its divisors is an integer number (2558236824).

Almost surely, 2^20264786809 is an apocalyptic number.

It is an amenable number.

20264786809 is a deficient number, since it is larger than the sum of its proper divisors (201107783).

20264786809 is a wasteful number, since it uses less digits than its factorization.

20264786809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42047.

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 20264786809 in words is "twenty billion, two hundred sixty-four million, seven hundred eighty-six thousand, eight hundred nine".