21192822 has 24 divisors (see below), whose sum is σ = 52477776. Its totient is φ = 6055056.

The previous prime is 21192797. The next prime is 21192827. The reversal of 21192822 is 22829112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21192827) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 83973 + ... + 84224.

It is an arithmetic number, because the mean of its divisors is an integer number (2186574).

Almost surely, 2^21192822 is an apocalyptic number.

21192822 is an abundant number, since it is smaller than the sum of its proper divisors (31284954).

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

21192822 is a wasteful number, since it uses less digits than its factorization.

21192822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168212 (or 168209 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 21192822 is about 4603.5662263076. The cubic root of 21192822 is about 276.7342609959.

The spelling of 21192822 in words is "twenty-one million, one hundred ninety-two thousand, eight hundred twenty-two".