21008092 has 24 divisors (see below), whose sum is σ = 42283136. Its totient is φ = 8946288.

The previous prime is 21008083. The next prime is 21008149. The reversal of 21008092 is 29080012.

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 7 ways as a sum of consecutive naturals, for example, 2263 + ... + 6865.

Almost surely, 2^21008092 is an apocalyptic number.

It is an amenable number.

21008092 is an abundant number, since it is smaller than the sum of its proper divisors (21275044).

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

21008092 is a wasteful number, since it uses less digits than its factorization.

21008092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4777 (or 4775 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 21008092 is about 4583.4585195025. The cubic root of 21008092 is about 275.9278499357.

The spelling of 21008092 in words is "twenty-one million, eight thousand, ninety-two".