20868242881 has 8 divisors (see below), whose sum is σ = 20946411200. Its totient is φ = 20790166320.

The previous prime is 20868242869. The next prime is 20868242903. The reversal of 20868242881 is 18824286802.

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 20868242881 - 2¹⁷ = 20868111809 is a prime.

It is a super-3 number, since 3×20868242881³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20868242981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450940 + ... + 495058.

It is an arithmetic number, because the mean of its divisors is an integer number (2618301400).

Almost surely, 2^20868242881 is an apocalyptic number.

It is an amenable number.

20868242881 is a deficient number, since it is larger than the sum of its proper divisors (78168319).

20868242881 is a wasteful number, since it uses less digits than its factorization.

20868242881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45879.

The product of its (nonzero) digits is 786432, while the sum is 49.

The spelling of 20868242881 in words is "twenty billion, eight hundred sixty-eight million, two hundred forty-two thousand, eight hundred eighty-one".