21834148 has 12 divisors (see below), whose sum is σ = 43668352. Its totient is φ = 9357480.

The previous prime is 21834121. The next prime is 21834167. The reversal of 21834148 is 84143812.

21834148 is an admirable number.

It is an unprimeable number.

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, 389868 + ... + 389923.

Almost surely, 2^21834148 is an apocalyptic number.

21834148 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21834148 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.

21834148 is a wasteful number, since it uses less digits than its factorization.

21834148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779802 (or 779800 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 21834148 is about 4672.7024300719. The cubic root of 21834148 is about 279.4980291996.

The spelling of 21834148 in words is "twenty-one million, eight hundred thirty-four thousand, one hundred forty-eight".