21021032 has 32 divisors (see below), whose sum is σ = 41368320. Its totient is φ = 10002240.

The previous prime is 21021001. The next prime is 21021043. The reversal of 21021032 is 23012012.

It is a happy 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, 13157 + ... + 14667.

It is an arithmetic number, because the mean of its divisors is an integer number (1292760).

Almost surely, 2^21021032 is an apocalyptic number.

It is an amenable number.

21021032 is a deficient number, since it is larger than the sum of its proper divisors (20347288).

21021032 is a wasteful number, since it uses less digits than its factorization.

21021032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601 (or 1597 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 21021032 is about 4584.8699000081. The cubic root of 21021032 is about 275.9844911820.

Adding to 21021032 its reverse (23012012), we get a palindrome (44033044).

The spelling of 21021032 in words is "twenty-one million, twenty-one thousand, thirty-two".