21716422586 has 4 divisors (see below), whose sum is σ = 32574633882. Its totient is φ = 10858211292.

The previous prime is 21716422583. The next prime is 21716422589. The reversal of 21716422586 is 68522461712.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21716422583) and next prime (21716422589).

It can be written as a sum of positive squares in only one way, i.e., 20354443561 + 1361979025 = 142669^2 + 36905^2 .

It is not an unprimeable number, because it can be changed into a prime (21716422583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5429105645 + ... + 5429105648.

Almost surely, 2^21716422586 is an apocalyptic number.

21716422586 is a deficient number, since it is larger than the sum of its proper divisors (10858211296).

21716422586 is a wasteful number, since it uses less digits than its factorization.

21716422586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10858211295.

The product of its digits is 322560, while the sum is 44.

The spelling of 21716422586 in words is "twenty-one billion, seven hundred sixteen million, four hundred twenty-two thousand, five hundred eighty-six".