21841012 has 12 divisors (see below), whose sum is σ = 38325280. Its totient is φ = 10890936.

The previous prime is 21840997. The next prime is 21841021. The reversal of 21841012 is 21014812.

It is a happy number.

It is a congruent 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, 5688 + ... + 8719.

Almost surely, 2^21841012 is an apocalyptic number.

It is an amenable number.

21841012 is a deficient number, since it is larger than the sum of its proper divisors (16484268).

21841012 is a wasteful number, since it uses less digits than its factorization.

21841012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14790 (or 14788 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 21841012 is about 4673.4368509695. The cubic root of 21841012 is about 279.5273147248.

Adding to 21841012 its reverse (21014812), we get a palindrome (42855824).

The spelling of 21841012 in words is "twenty-one million, eight hundred forty-one thousand, twelve".