21483330 has 32 divisors (see below), whose sum is σ = 56248128. Its totient is φ = 5208000.

The previous prime is 21483317. The next prime is 21483337. The reversal of 21483330 is 3338412.

It is a self number, because there is not a number n which added to its sum of digits gives 21483330.

It is not an unprimeable number, because it can be changed into a prime (21483337) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 32221 + ... + 32880.

It is an arithmetic number, because the mean of its divisors is an integer number (1757754).

Almost surely, 2^21483330 is an apocalyptic number.

21483330 is an abundant number, since it is smaller than the sum of its proper divisors (34764798).

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

21483330 is a wasteful number, since it uses less digits than its factorization.

21483330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65122.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 21483330 is about 4635.0113268470. The cubic root of 21483330 is about 277.9930039818.

The spelling of 21483330 in words is "twenty-one million, four hundred eighty-three thousand, three hundred thirty".