21494883312 has 360 divisors, whose sum is σ = 76873829760. Its totient is φ = 5564401920.

The previous prime is 21494883299. The next prime is 21494883329. The reversal of 21494883312 is 21338849412.

21494883312 is a `hidden beast` number, since 214 + 9 + 48 + 83 + 312 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 3079987 + ... + 3086957.

It is an arithmetic number, because the mean of its divisors is an integer number (213538416).

Almost surely, 2^21494883312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21494883312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38436914880).

21494883312 is an abundant number, since it is smaller than the sum of its proper divisors (55378946448).

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

21494883312 is a wasteful number, since it uses less digits than its factorization.

21494883312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7041 (or 7025 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The spelling of 21494883312 in words is "twenty-one billion, four hundred ninety-four million, eight hundred eighty-three thousand, three hundred twelve".