20864868284 has 12 divisors (see below), whose sum is σ = 39322251864. Its totient is φ = 9629939184.

The previous prime is 20864868251. The next prime is 20864868287. The reversal of 20864868284 is 48286846802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20864868287) 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, 200623682 + ... + 200623785.

It is an arithmetic number, because the mean of its divisors is an integer number (3276854322).

Almost surely, 2^20864868284 is an apocalyptic number.

It is an amenable number.

20864868284 is a deficient number, since it is larger than the sum of its proper divisors (18457383580).

20864868284 is a wasteful number, since it uses less digits than its factorization.

20864868284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401247484 (or 401247482 counting only the distinct ones).

The product of its (nonzero) digits is 9437184, while the sum is 56.

The spelling of 20864868284 in words is "twenty billion, eight hundred sixty-four million, eight hundred sixty-eight thousand, two hundred eighty-four".