21494324160 has 448 divisors, whose sum is σ = 79056829440. Its totient is φ = 5492551680.

The previous prime is 21494324101. The next prime is 21494324179. The reversal of 21494324160 is 6142349412.

21494324160 is a `hidden beast` number, since 2 + 1 + 494 + 3 + 2 + 4 + 160 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22696807 + ... + 22697753.

Almost surely, 2^21494324160 is an apocalyptic number.

21494324160 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 21494324160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39528414720).

21494324160 is an abundant number, since it is smaller than the sum of its proper divisors (57562505280).

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

21494324160 is a wasteful number, since it uses less digits than its factorization.

21494324160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081 (or 1065 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 21494324160 in words is "twenty-one billion, four hundred ninety-four million, three hundred twenty-four thousand, one hundred sixty".