21126192 has 40 divisors (see below), whose sum is σ = 55353600. Its totient is φ = 6941760.

The previous prime is 21126169. The next prime is 21126229. The reversal of 21126192 is 29162112.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309 + ... + 6507.

It is an arithmetic number, because the mean of its divisors is an integer number (1383840).

Almost surely, 2^21126192 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 21126192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27676800).

21126192 is an abundant number, since it is smaller than the sum of its proper divisors (34227408).

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

21126192 is a wasteful number, since it uses less digits than its factorization.

21126192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6281 (or 6275 counting only the distinct ones).

The product of its digits is 432, while the sum is 24.

The square root of 21126192 is about 4596.3237483885. The cubic root of 21126192 is about 276.4439400336.

The spelling of 21126192 in words is "twenty-one million, one hundred twenty-six thousand, one hundred ninety-two".