21116492 has 24 divisors (see below), whose sum is σ = 38591280. Its totient is φ = 10100160.

The previous prime is 21116479. The next prime is 21116503. The reversal of 21116492 is 29461112.

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, 7859 + ... + 10197.

It is an arithmetic number, because the mean of its divisors is an integer number (1607970).

Almost surely, 2^21116492 is an apocalyptic number.

It is an amenable number.

21116492 is a deficient number, since it is larger than the sum of its proper divisors (17474788).

21116492 is a wasteful number, since it uses less digits than its factorization.

21116492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441 (or 2439 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

The square root of 21116492 is about 4595.2684361199. The cubic root of 21116492 is about 276.4016242087.

The spelling of 21116492 in words is "twenty-one million, one hundred sixteen thousand, four hundred ninety-two".