21066192 has 60 divisors (see below), whose sum is σ = 67381600. Its totient is φ = 6018624.

The previous prime is 21066187. The next prime is 21066203. The reversal of 21066192 is 29166012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9442 + ... + 11457.

Almost surely, 2^21066192 is an apocalyptic number.

It is an amenable number.

21066192 is an abundant number, since it is smaller than the sum of its proper divisors (46315408).

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

21066192 is a wasteful number, since it uses less digits than its factorization.

21066192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20920 (or 20911 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 21066192 is about 4589.7921521568. The cubic root of 21066192 is about 276.1819845793.

The spelling of 21066192 in words is "twenty-one million, sixty-six thousand, one hundred ninety-two".