21858600960 has 576 divisors, whose sum is σ = 89455242240. Its totient is φ = 4830658560.

The previous prime is 21858600947. The next prime is 21858600989. The reversal of 21858600960 is 6900685812.

21858600960 is a `hidden beast` number, since 2 + 1 + 8 + 586 + 0 + 0 + 9 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19998174 + ... + 19999266.

It is an arithmetic number, because the mean of its divisors is an integer number (155304240).

Almost surely, 2^21858600960 is an apocalyptic number.

21858600960 is a gapful number since it is divisible by the number (20) 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 21858600960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44727621120).

21858600960 is an abundant number, since it is smaller than the sum of its proper divisors (67596641280).

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

21858600960 is a wasteful number, since it uses less digits than its factorization.

21858600960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164 (or 1141 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 21858600960 in words is "twenty-one billion, eight hundred fifty-eight million, six hundred thousand, nine hundred sixty".