21760132 has 12 divisors (see below), whose sum is σ = 38602396. Its totient is φ = 10730880.

The previous prime is 21760127. The next prime is 21760133. The reversal of 21760132 is 23106712.

It can be written as a sum of positive squares in 2 ways, for example, as 13660416 + 8099716 = 3696^2 + 2846^2 .

It is not an unprimeable number, because it can be changed into a prime (21760133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36969 + ... + 37552.

Almost surely, 2^21760132 is an apocalyptic number.

It is an amenable number.

21760132 is a deficient number, since it is larger than the sum of its proper divisors (16842264).

21760132 is a wasteful number, since it uses less digits than its factorization.

21760132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74598 (or 74596 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 21760132 is about 4664.7756644881. The cubic root of 21760132 is about 279.1818463962.

Adding to 21760132 its reverse (23106712), we get a palindrome (44866844).

The spelling of 21760132 in words is "twenty-one million, seven hundred sixty thousand, one hundred thirty-two".