20868242880 has 56 divisors (see below), whose sum is σ = 66256674192. Its totient is φ = 5564864512.

The previous prime is 20868242869. The next prime is 20868242903. The reversal of 20868242880 is 8824286802.

It is a happy number.

It is a super-3 number, since 3×20868242880³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

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, 10867917 + ... + 10869836.

Almost surely, 2^20868242880 is an apocalyptic number.

20868242880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20868242880 is an abundant number, since it is smaller than the sum of its proper divisors (45388431312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20868242880 is a wasteful number, since it uses less digits than its factorization.

20868242880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21737773 (or 21737763 counting only the distinct ones).

The product of its (nonzero) digits is 786432, while the sum is 48.

The spelling of 20868242880 in words is "twenty billion, eight hundred sixty-eight million, two hundred forty-two thousand, eight hundred eighty".