21846084 has 48 divisors (see below), whose sum is σ = 55366080. Its totient is φ = 6664320.

The previous prime is 21846059. The next prime is 21846091. The reversal of 21846084 is 48064812.

It is a super-2 number, since 2×21846084² = 954502772270112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19902 + ... + 20970.

It is an arithmetic number, because the mean of its divisors is an integer number (1153460).

Almost surely, 2^21846084 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21846084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27683040).

21846084 is an abundant number, since it is smaller than the sum of its proper divisors (33519996).

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

21846084 is a wasteful number, since it uses less digits than its factorization.

21846084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220 (or 1218 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 21846084 is about 4673.9794608021. The cubic root of 21846084 is about 279.5489506698.

The spelling of 21846084 in words is "twenty-one million, eight hundred forty-six thousand, eighty-four".