20854383211 has 4 divisors (see below), whose sum is σ = 20854842624. Its totient is φ = 20853923800.

The previous prime is 20854383203. The next prime is 20854383229. The reversal of 20854383211 is 11238345802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11238345802 = 2 ⋅5619172901.

It is a cyclic number.

It is not a de Polignac number, because 20854383211 - 2³ = 20854383203 is a prime.

It is a super-2 number, since 2×20854383211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20854383241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153100 + ... + 255241.

It is an arithmetic number, because the mean of its divisors is an integer number (5213710656).

Almost surely, 2^20854383211 is an apocalyptic number.

20854383211 is a deficient number, since it is larger than the sum of its proper divisors (459413).

20854383211 is an equidigital number, since it uses as much as digits as its factorization.

20854383211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459412.

The product of its (nonzero) digits is 46080, while the sum is 37.

The spelling of 20854383211 in words is "twenty billion, eight hundred fifty-four million, three hundred eighty-three thousand, two hundred eleven".