21532082 has 32 divisors (see below), whose sum is σ = 38465280. Its totient is φ = 8910720.

The previous prime is 21532067. The next prime is 21532087. The reversal of 21532082 is 28023512.

It is not an unprimeable number, because it can be changed into a prime (21532087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22118 + ... + 23070.

It is an arithmetic number, because the mean of its divisors is an integer number (1202040).

Almost surely, 2^21532082 is an apocalyptic number.

21532082 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21532082 is a deficient number, since it is larger than the sum of its proper divisors (16933198).

21532082 is a wasteful number, since it uses less digits than its factorization.

21532082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 21532082 is about 4640.2674491887. The cubic root of 21532082 is about 278.2031277713.

Adding to 21532082 its reverse (28023512), we get a palindrome (49555594).

The spelling of 21532082 in words is "twenty-one million, five hundred thirty-two thousand, eighty-two".