21116892 has 24 divisors (see below), whose sum is σ = 49348096. Its totient is φ = 7028208.

The previous prime is 21116861. The next prime is 21116911. The reversal of 21116892 is 29861112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12693 + ... + 14259.

Almost surely, 2^21116892 is an apocalyptic number.

It is an amenable number.

21116892 is an abundant number, since it is smaller than the sum of its proper divisors (28231204).

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

21116892 is a wasteful number, since it uses less digits than its factorization.

21116892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697 (or 2695 counting only the distinct ones).

The product of its digits is 1728, while the sum is 30.

The square root of 21116892 is about 4595.3119589425. The cubic root of 21116892 is about 276.4033694473.

The spelling of 21116892 in words is "twenty-one million, one hundred sixteen thousand, eight hundred ninety-two".