21858568704 has 240 divisors, whose sum is σ = 73093006272. Its totient is φ = 6159089664.

The previous prime is 21858568691. The next prime is 21858568717. The reversal of 21858568704 is 40786585812.

21858568704 is a `hidden beast` number, since 2 + 1 + 8 + 5 + 8 + 568 + 70 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (21858568691) and next prime (21858568717).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2350047 + ... + 2359329.

Almost surely, 2^21858568704 is an apocalyptic number.

21858568704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21858568704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36546503136).

21858568704 is an abundant number, since it is smaller than the sum of its proper divisors (51234437568).

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

21858568704 is an equidigital number, since it uses as much as digits as its factorization.

21858568704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9387 (or 9368 counting only the distinct ones).

The product of its (nonzero) digits is 4300800, while the sum is 54.

The spelling of 21858568704 in words is "twenty-one billion, eight hundred fifty-eight million, five hundred sixty-eight thousand, seven hundred four".