21992182 has 4 divisors (see below), whose sum is σ = 32988276. Its totient is φ = 10996090.

The previous prime is 21992161. The next prime is 21992183. The reversal of 21992182 is 28129912.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21992182² = 967312138242248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21992183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5498044 + ... + 5498047.

It is an arithmetic number, because the mean of its divisors is an integer number (8247069).

Almost surely, 2^21992182 is an apocalyptic number.

21992182 is a deficient number, since it is larger than the sum of its proper divisors (10996094).

21992182 is a wasteful number, since it uses less digits than its factorization.

21992182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10996093.

The product of its digits is 5184, while the sum is 34.

The square root of 21992182 is about 4689.5822841699. The cubic root of 21992182 is about 280.1707377036.

The spelling of 21992182 in words is "twenty-one million, nine hundred ninety-two thousand, one hundred eighty-two".