21703332 has 24 divisors (see below), whose sum is σ = 57875776. Its totient is φ = 6200928.

The previous prime is 21703307. The next prime is 21703337. The reversal of 21703332 is 23330712.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 21703299 and 21703308.

It is not an unprimeable number, because it can be changed into a prime (21703337) 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 7 ways as a sum of consecutive naturals, for example, 129103 + ... + 129270.

Almost surely, 2^21703332 is an apocalyptic number.

It is an amenable number.

21703332 is an abundant number, since it is smaller than the sum of its proper divisors (36172444).

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

21703332 is a wasteful number, since it uses less digits than its factorization.

21703332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258387 (or 258385 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 21703332 is about 4658.6835050259. The cubic root of 21703332 is about 278.9387206278.

The spelling of 21703332 in words is "twenty-one million, seven hundred three thousand, three hundred thirty-two".