21327310 has 16 divisors (see below), whose sum is σ = 40410000. Its totient is φ = 8081856.

The previous prime is 21327307. The next prime is 21327343. The reversal of 21327310 is 1372312.

It is a super-2 number, since 2×21327310² = 909708303672200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a zygodrome in base 9.

It is a congruent 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, 55935 + ... + 56314.

It is an arithmetic number, because the mean of its divisors is an integer number (2525625).

Almost surely, 2^21327310 is an apocalyptic number.

21327310 is a deficient number, since it is larger than the sum of its proper divisors (19082690).

21327310 is a wasteful number, since it uses less digits than its factorization.

21327310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112275.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 21327310 is about 4618.1500625250. The cubic root of 21327310 is about 277.3184051203.

Adding to 21327310 its reverse (1372312), we get a palindrome (22699622).

The spelling of 21327310 in words is "twenty-one million, three hundred twenty-seven thousand, three hundred ten".