21484332 has 24 divisors (see below), whose sum is σ = 55700400. Its totient is φ = 7161408.

The previous prime is 21484327. The next prime is 21484339. The reversal of 21484332 is 23348412.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21484296 and 21484305.

It is not an unprimeable number, because it can be changed into a prime (21484339) 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 7 ways as a sum of consecutive naturals, for example, 99357 + ... + 99572.

It is an arithmetic number, because the mean of its divisors is an integer number (2320850).

Almost surely, 2^21484332 is an apocalyptic number.

It is an amenable number.

21484332 is an abundant number, since it is smaller than the sum of its proper divisors (34216068).

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

21484332 is a wasteful number, since it uses less digits than its factorization.

21484332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198942 (or 198934 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 21484332 is about 4635.1194159374. The cubic root of 21484332 is about 277.9973258546.

The spelling of 21484332 in words is "twenty-one million, four hundred eighty-four thousand, three hundred thirty-two".