21494715608880 has 360 divisors, whose sum is σ = 79433098508400. Its totient is φ = 5194144631808.

The previous prime is 21494715608809. The next prime is 21494715608897. The reversal of 21494715608880 is 8880651749412.

21494715608880 is a `hidden beast` number, since 2 + 1 + 4 + 9 + 4 + 7 + 15 + 608 + 8 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5751606 + ... + 8721834.

Almost surely, 2^{21494715608880} is an apocalyptic number.

21494715608880 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 21494715608880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39716549254200).

21494715608880 is an abundant number, since it is smaller than the sum of its proper divisors (57938382899520).

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

21494715608880 is a wasteful number, since it uses less digits than its factorization.

21494715608880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2970313 (or 2970281 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 63.

The spelling of 21494715608880 in words is "twenty-one trillion, four hundred ninety-four billion, seven hundred fifteen million, six hundred eight thousand, eight hundred eighty".