21532088 has 16 divisors (see below), whose sum is σ = 40692480. Its totient is φ = 10680768.

The previous prime is 21532087. The next prime is 21532097. The reversal of 21532088 is 88023512.

It is a self number, because there is not a number n which added to its sum of digits gives 21532088.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 9581 + ... + 11612.

It is an arithmetic number, because the mean of its divisors is an integer number (2543280).

Almost surely, 2^21532088 is an apocalyptic number.

It is an amenable number.

21532088 is a deficient number, since it is larger than the sum of its proper divisors (19160392).

21532088 is a wasteful number, since it uses less digits than its factorization.

21532088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21326 (or 21322 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 21532088 is about 4640.2680957031. The cubic root of 21532088 is about 278.2031536121.

The spelling of 21532088 in words is "twenty-one million, five hundred thirty-two thousand, eighty-eight".