20868842268 has 60 divisors (see below), whose sum is σ = 56029775032. Its totient is φ = 6768269280.

The previous prime is 20868842243. The next prime is 20868842339. The reversal of 20868842268 is 86224886802.

It is a happy number.

20868842268 is a `hidden beast` number, since 2 + 0 + 86 + 88 + 422 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 19 ways as a sum of consecutive naturals, for example, 858418 + ... + 882393.

Almost surely, 2^20868842268 is an apocalyptic number.

It is an amenable number.

20868842268 is an abundant number, since it is smaller than the sum of its proper divisors (35160932764).

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

20868842268 is a wasteful number, since it uses less digits than its factorization.

20868842268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740864 (or 1740853 counting only the distinct ones).

The product of its (nonzero) digits is 4718592, while the sum is 54.

The spelling of 20868842268 in words is "twenty billion, eight hundred sixty-eight million, eight hundred forty-two thousand, two hundred sixty-eight".