21238088 has 32 divisors (see below), whose sum is σ = 40824000. Its totient is φ = 10355520.

The previous prime is 21238073. The next prime is 21238093. The reversal of 21238088 is 88083212.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 78818 + ... + 79086.

It is an arithmetic number, because the mean of its divisors is an integer number (1275750).

Almost surely, 2^21238088 is an apocalyptic number.

It is an amenable number.

21238088 is a deficient number, since it is larger than the sum of its proper divisors (19585912).

21238088 is a wasteful number, since it uses less digits than its factorization.

21238088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 21238088 is about 4608.4800097212. The cubic root of 21238088 is about 276.9311475489.

The spelling of 21238088 in words is "twenty-one million, two hundred thirty-eight thousand, eighty-eight".