21481096 has 64 divisors (see below), whose sum is σ = 52214400. Its totient is φ = 8045568.

The previous prime is 21481091. The next prime is 21481111. The reversal of 21481096 is 69018412.

It is a happy number.

It is a super-2 number, since 2×21481096² = 922874970722432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21481091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13056 + ... + 14608.

It is an arithmetic number, because the mean of its divisors is an integer number (815850).

Almost surely, 2^21481096 is an apocalyptic number.

21481096 is a gapful number since it is divisible by the number (26) 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 21481096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26107200).

21481096 is an abundant number, since it is smaller than the sum of its proper divisors (30733304).

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

21481096 is a wasteful number, since it uses less digits than its factorization.

21481096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598 (or 1594 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 21481096 is about 4634.7703287218. The cubic root of 21481096 is about 277.9833677057.

The spelling of 21481096 in words is "twenty-one million, four hundred eighty-one thousand, ninety-six".