21821486286 has 16 divisors (see below), whose sum is σ = 43645395024. Its totient is φ = 7273425024.

The previous prime is 21821486273. The next prime is 21821486317. The reversal of 21821486286 is 68268412812.

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, 29046 + ... + 210918.

It is an arithmetic number, because the mean of its divisors is an integer number (2727837189).

Almost surely, 2^21821486286 is an apocalyptic number.

21821486286 is an abundant number, since it is smaller than the sum of its proper divisors (21823908738).

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

21821486286 is a wasteful number, since it uses less digits than its factorization.

21821486286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201875.

The product of its digits is 589824, while the sum is 48.

The spelling of 21821486286 in words is "twenty-one billion, eight hundred twenty-one million, four hundred eighty-six thousand, two hundred eighty-six".