21029332 has 12 divisors (see below), whose sum is σ = 36834336. Its totient is φ = 10505240.

The previous prime is 21029297. The next prime is 21029339. The reversal of 21029332 is 23392012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21029339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5793 + ... + 8695.

It is an arithmetic number, because the mean of its divisors is an integer number (3069528).

Almost surely, 2^21029332 is an apocalyptic number.

It is an amenable number.

21029332 is a deficient number, since it is larger than the sum of its proper divisors (15805004).

21029332 is a wasteful number, since it uses less digits than its factorization.

21029332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4718 (or 4716 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 21029332 is about 4585.7749617704. The cubic root of 21029332 is about 276.0208098851.

The spelling of 21029332 in words is "twenty-one million, twenty-nine thousand, three hundred thirty-two".