21089348 has 12 divisors (see below), whose sum is σ = 42178752. Its totient is φ = 9038280.

The previous prime is 21089291. The next prime is 21089359. The reversal of 21089348 is 84398012.

It is a happy number.

21089348 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376568 + ... + 376623.

It is an arithmetic number, because the mean of its divisors is an integer number (3514896).

Almost surely, 2^21089348 is an apocalyptic number.

21089348 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21089348 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21089348 is a wasteful number, since it uses less digits than its factorization.

21089348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753202 (or 753200 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 21089348 is about 4592.3140136537. The cubic root of 21089348 is about 276.2831407863.

The spelling of 21089348 in words is "twenty-one million, eighty-nine thousand, three hundred forty-eight".