21741658864 has 10 divisors (see below), whose sum is σ = 42124464080. Its totient is φ = 10870829424.

The previous prime is 21741658859. The next prime is 21741658871. The reversal of 21741658864 is 46885614712.

It is a congruent number.

It is an unprimeable number.

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, 679426824 + ... + 679426855.

It is an arithmetic number, because the mean of its divisors is an integer number (4212446408).

Almost surely, 2^21741658864 is an apocalyptic number.

It is an amenable number.

21741658864 is a deficient number, since it is larger than the sum of its proper divisors (20382805216).

21741658864 is a wasteful number, since it uses less digits than its factorization.

21741658864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358853687 (or 1358853681 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 52.

The spelling of 21741658864 in words is "twenty-one billion, seven hundred forty-one million, six hundred fifty-eight thousand, eight hundred sixty-four".