20826923065 has 8 divisors (see below), whose sum is σ = 26914792968. Its totient is φ = 15379881600.

The previous prime is 20826922981. The next prime is 20826923071. The reversal of 20826923065 is 56032962802.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4927478416 + 15899444649 = 70196^2 + 126093^2 .

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

It is not a de Polignac number, because 20826923065 - 2³¹ = 18679439417 is a prime.

It is a super-3 number, since 3×20826923065³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160207036 + ... + 160207165.

It is an arithmetic number, because the mean of its divisors is an integer number (3364349121).

Almost surely, 2^20826923065 is an apocalyptic number.

It is an amenable number.

20826923065 is a deficient number, since it is larger than the sum of its proper divisors (6087869903).

20826923065 is a wasteful number, since it uses less digits than its factorization.

20826923065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320414219.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 20826923065 in words is "twenty billion, eight hundred twenty-six million, nine hundred twenty-three thousand, sixty-five".