21496328 has 32 divisors (see below), whose sum is σ = 46267200. Its totient is φ = 9172032.

The previous prime is 21496327. The next prime is 21496331. The reversal of 21496328 is 82369412.

It is not an unprimeable number, because it can be changed into a prime (21496327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14351 + ... + 15777.

It is an arithmetic number, because the mean of its divisors is an integer number (1445850).

Almost surely, 2^21496328 is an apocalyptic number.

21496328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21496328 is an abundant number, since it is smaller than the sum of its proper divisors (24770872).

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

21496328 is a wasteful number, since it uses less digits than its factorization.

21496328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709 (or 1705 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 21496328 is about 4636.4132688966. The cubic root of 21496328 is about 278.0490571260.

The spelling of 21496328 in words is "twenty-one million, four hundred ninety-six thousand, three hundred twenty-eight".