21327650 has 12 divisors (see below), whose sum is σ = 39669522. Its totient is φ = 8531040.

The previous prime is 21327637. The next prime is 21327653. The reversal of 21327650 is 5672312.

It can be written as a sum of positive squares in 3 ways, for example, as 20784481 + 543169 = 4559^2 + 737^2 .

It is not an unprimeable number, because it can be changed into a prime (21327653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 213227 + ... + 213326.

Almost surely, 2^21327650 is an apocalyptic number.

21327650 is a deficient number, since it is larger than the sum of its proper divisors (18341872).

21327650 is a wasteful number, since it uses less digits than its factorization.

21327650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426565 (or 426560 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 21327650 is about 4618.1868736551. The cubic root of 21327650 is about 277.3198787826.

Adding to 21327650 its reverse (5672312), we get a palindrome (26999962).

The spelling of 21327650 in words is "twenty-one million, three hundred twenty-seven thousand, six hundred fifty".