21188849486 has 16 divisors (see below), whose sum is σ = 36475729920. Its totient is φ = 9042938520.

The previous prime is 21188849467. The next prime is 21188849501. The reversal of 21188849486 is 68494888112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3162950 + ... + 3169641.

It is an arithmetic number, because the mean of its divisors is an integer number (2279733120).

Almost surely, 2^21188849486 is an apocalyptic number.

21188849486 is a deficient number, since it is larger than the sum of its proper divisors (15286880434).

21188849486 is a wasteful number, since it uses less digits than its factorization.

21188849486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6332839.

The product of its digits is 7077888, while the sum is 59.

The spelling of 21188849486 in words is "twenty-one billion, one hundred eighty-eight million, eight hundred forty-nine thousand, four hundred eighty-six".