21084192 has 96 divisors (see below), whose sum is σ = 64229760. Its totient is φ = 6716160.

The previous prime is 21084187. The next prime is 21084227. The reversal of 21084192 is 29148012.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 19342 + ... + 20402.

It is an arithmetic number, because the mean of its divisors is an integer number (669060).

Almost surely, 2^21084192 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 21084192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32114880).

21084192 is an abundant number, since it is smaller than the sum of its proper divisors (43145568).

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

21084192 is a wasteful number, since it uses less digits than its factorization.

21084192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103 (or 1089 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 21084192 is about 4591.7526065763. The cubic root of 21084192 is about 276.2606233843.

The spelling of 21084192 in words is "twenty-one million, eighty-four thousand, one hundred ninety-two".