20648854159 has 4 divisors (see below), whose sum is σ = 20657639520. Its totient is φ = 20640068800.

The previous prime is 20648854157. The next prime is 20648854183. The reversal of 20648854159 is 95145884602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95145884602 = 2 ⋅47572942301.

It is a cyclic number.

It is not a de Polignac number, because 20648854159 - 2¹ = 20648854157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20648854157) 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, 4389154 + ... + 4393855.

It is an arithmetic number, because the mean of its divisors is an integer number (5164409880).

Almost surely, 2^20648854159 is an apocalyptic number.

20648854159 is a deficient number, since it is larger than the sum of its proper divisors (8785361).

20648854159 is an equidigital number, since it uses as much as digits as its factorization.

20648854159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8785360.

The product of its (nonzero) digits is 2764800, while the sum is 52.

The spelling of 20648854159 in words is "twenty billion, six hundred forty-eight million, eight hundred fifty-four thousand, one hundred fifty-nine".