21145684286 has 8 divisors (see below), whose sum is σ = 31725216864. Its totient is φ = 10570612000.

The previous prime is 21145684279. The next prime is 21145684327. The reversal of 21145684286 is 68248654112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21145684286.

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 3 ways as a sum of consecutive naturals, for example, 1103195 + ... + 1122198.

It is an arithmetic number, because the mean of its divisors is an integer number (3965652108).

Almost surely, 2^21145684286 is an apocalyptic number.

21145684286 is a deficient number, since it is larger than the sum of its proper divisors (10579532578).

21145684286 is a wasteful number, since it uses less digits than its factorization.

21145684286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230146.

The product of its digits is 737280, while the sum is 47.

The spelling of 21145684286 in words is "twenty-one billion, one hundred forty-five million, six hundred eighty-four thousand, two hundred eighty-six".