21300632 has 16 divisors (see below), whose sum is σ = 40024800. Its totient is φ = 10627360.

The previous prime is 21300619. The next prime is 21300649. The reversal of 21300632 is 23600312.

It is a self number, because there is not a number n which added to its sum of digits gives 21300632.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1457 + ... + 6687.

It is an arithmetic number, because the mean of its divisors is an integer number (2501550).

Almost surely, 2^21300632 is an apocalyptic number.

It is an amenable number.

21300632 is a deficient number, since it is larger than the sum of its proper divisors (18724168).

21300632 is a wasteful number, since it uses less digits than its factorization.

21300632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5746 (or 5742 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 21300632 is about 4615.2607726975. The cubic root of 21300632 is about 277.2027257814.

Adding to 21300632 its reverse (23600312), we get a palindrome (44900944).

The spelling of 21300632 in words is "twenty-one million, three hundred thousand, six hundred thirty-two".