21868348 has 24 divisors (see below), whose sum is σ = 39316032. Its totient is φ = 10638144.

The previous prime is 21868337. The next prime is 21868367. The reversal of 21868348 is 84386812.

It is a self number, because there is not a number n which added to its sum of digits gives 21868348.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54886 + ... + 55282.

It is an arithmetic number, because the mean of its divisors is an integer number (1638168).

Almost surely, 2^21868348 is an apocalyptic number.

It is an amenable number.

21868348 is a deficient number, since it is larger than the sum of its proper divisors (17447684).

21868348 is a wasteful number, since it uses less digits than its factorization.

21868348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 739 counting only the distinct ones).

The product of its digits is 73728, while the sum is 40.

The square root of 21868348 is about 4676.3605506847. The cubic root of 21868348 is about 279.6438840031.

The spelling of 21868348 in words is "twenty-one million, eight hundred sixty-eight thousand, three hundred forty-eight".