20816101723 has 8 divisors (see below), whose sum is σ = 21722658048. Its totient is φ = 19909671144.

The previous prime is 20816101693. The next prime is 20816101793. The reversal of 20816101723 is 32710161802.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20816101723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20816101793) by changing a digit.

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, 493636 + ... + 534142.

It is an arithmetic number, because the mean of its divisors is an integer number (2715332256).

Almost surely, 2^20816101723 is an apocalyptic number.

20816101723 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20816101723 is a deficient number, since it is larger than the sum of its proper divisors (906556325).

20816101723 is a wasteful number, since it uses less digits than its factorization.

20816101723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62873.

The product of its (nonzero) digits is 4032, while the sum is 31.

The spelling of 20816101723 in words is "twenty billion, eight hundred sixteen million, one hundred one thousand, seven hundred twenty-three".