20853388577 has 8 divisors (see below), whose sum is σ = 23833339200. Its totient is φ = 17873661744.

The previous prime is 20853388511. The next prime is 20853388601. The reversal of 20853388577 is 77588335802.

It is a happy number.

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 20853388577 - 2¹⁴ = 20853372193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20853388477) 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, 271574 + ... + 339792.

It is an arithmetic number, because the mean of its divisors is an integer number (2979167400).

Almost surely, 2^20853388577 is an apocalyptic number.

It is an amenable number.

20853388577 is a deficient number, since it is larger than the sum of its proper divisors (2979950623).

20853388577 is an equidigital number, since it uses as much as digits as its factorization.

20853388577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111895.

The product of its (nonzero) digits is 11289600, while the sum is 56.

The spelling of 20853388577 in words is "twenty billion, eight hundred fifty-three million, three hundred eighty-eight thousand, five hundred seventy-seven".