21059332 has 24 divisors (see below), whose sum is σ = 42699776. Its totient is φ = 8900928.

The previous prime is 21059309. The next prime is 21059347. The reversal of 21059332 is 23395012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21059297 and 21059306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3108 + ... + 7195.

Almost surely, 2^21059332 is an apocalyptic number.

It is an amenable number.

21059332 is an abundant number, since it is smaller than the sum of its proper divisors (21640444).

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

21059332 is a wasteful number, since it uses less digits than its factorization.

21059332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10387 (or 10385 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 21059332 is about 4589.0447807795. The cubic root of 21059332 is about 276.1520026680.

The spelling of 21059332 in words is "twenty-one million, fifty-nine thousand, three hundred thirty-two".