20696843005 has 8 divisors (see below), whose sum is σ = 24839686872. Its totient is φ = 16555157568.

The previous prime is 20696842979. The next prime is 20696843021. The reversal of 20696843005 is 50034869602.

It can be written as a sum of positive squares in 4 ways, for example, as 390023001 + 20306820004 = 19749^2 + 142502^2 .

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 20696843005 - 2⁹ = 20696842493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249802 + ... + 322171.

It is an arithmetic number, because the mean of its divisors is an integer number (3104960859).

Almost surely, 2^20696843005 is an apocalyptic number.

It is an amenable number.

20696843005 is a deficient number, since it is larger than the sum of its proper divisors (4142843867).

20696843005 is an equidigital number, since it uses as much as digits as its factorization.

20696843005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579215.

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

The spelling of 20696843005 in words is "twenty billion, six hundred ninety-six million, eight hundred forty-three thousand, five".