21804510559104 has 896 divisors, whose sum is σ = 82325418598080. Its totient is φ = 5595136819200.

The previous prime is 21804510559061. The next prime is 21804510559121. The reversal of 21804510559104 is 40195501540812.

21804510559104 is a `hidden beast` number, since 2 + 1 + 8 + 0 + 4 + 51 + 0 + 5 + 591 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (896).

It is a self number, because there is not a number n which added to its sum of digits gives 21804510559104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 314146804 + ... + 314216204.

Almost surely, 2^{21804510559104} is an apocalyptic number.

21804510559104 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 21804510559104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41162709299040).

21804510559104 is an abundant number, since it is smaller than the sum of its proper divisors (60520908038976).

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

21804510559104 is an equidigital number, since it uses as much as digits as its factorization.

21804510559104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69490 (or 69463 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 45.

The spelling of 21804510559104 in words is "twenty-one trillion, eight hundred four billion, five hundred ten million, five hundred fifty-nine thousand, one hundred four".