21023332 has 24 divisors (see below), whose sum is σ = 41432832. Its totient is φ = 9247200.

The previous prime is 21023323. The next prime is 21023341. The reversal of 21023332 is 23332012.

It is an interprime number because it is at equal distance from previous prime (21023323) and next prime (21023341).

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, 6343 + ... + 9070.

It is an arithmetic number, because the mean of its divisors is an integer number (1726368).

Almost surely, 2^21023332 is an apocalyptic number.

21023332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21023332 is a deficient number, since it is larger than the sum of its proper divisors (20409500).

21023332 is a wasteful number, since it uses less digits than its factorization.

21023332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15459 (or 15457 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 21023332 is about 4585.1207181491. The cubic root of 21023332 is about 275.9945563584.

Adding to 21023332 its reverse (23332012), we get a palindrome (44355344).

The spelling of 21023332 in words is "twenty-one million, twenty-three thousand, three hundred thirty-two".