20827308765 has 8 divisors (see below), whose sum is σ = 33323694048. Its totient is φ = 11107898000.

The previous prime is 20827308713. The next prime is 20827308829. The reversal of 20827308765 is 56780372802.

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

It is not a de Polignac number, because 20827308765 - 2⁷ = 20827308637 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 694243611 + ... + 694243640.

It is an arithmetic number, because the mean of its divisors is an integer number (4165461756).

Almost surely, 2^20827308765 is an apocalyptic number.

It is an amenable number.

20827308765 is a deficient number, since it is larger than the sum of its proper divisors (12496385283).

20827308765 is a wasteful number, since it uses less digits than its factorization.

20827308765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388487259.

The product of its (nonzero) digits is 1128960, while the sum is 48.

The spelling of 20827308765 in words is "twenty billion, eight hundred twenty-seven million, three hundred eight thousand, seven hundred sixty-five".