21600753 has 8 divisors (see below), whose sum is σ = 28951008. Its totient is φ = 14325504.

The previous prime is 21600743. The next prime is 21600757. The reversal of 21600753 is 35700612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21600753 - 2⁸ = 21600497 is a prime.

It is a super-3 number, since 3×21600753³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21600757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18075 + ... + 19232.

It is an arithmetic number, because the mean of its divisors is an integer number (3618876).

Almost surely, 2^21600753 is an apocalyptic number.

It is an amenable number.

21600753 is a deficient number, since it is larger than the sum of its proper divisors (7350255).

21600753 is a wasteful number, since it uses less digits than its factorization.

21600753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37503.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 21600753 is about 4647.6610246445. The cubic root of 21600753 is about 278.4985661980.

The spelling of 21600753 in words is "twenty-one million, six hundred thousand, seven hundred fifty-three".