21883823 has 8 divisors (see below), whose sum is σ = 23605008. Its totient is φ = 20168064.

The previous prime is 21883819. The next prime is 21883837. The reversal of 21883823 is 32838812.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21883823 - 2² = 21883819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21883853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11840 + ... + 13562.

It is an arithmetic number, because the mean of its divisors is an integer number (2950626).

Almost surely, 2^21883823 is an apocalyptic number.

21883823 is a deficient number, since it is larger than the sum of its proper divisors (1721185).

21883823 is a wasteful number, since it uses less digits than its factorization.

21883823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2713.

The product of its digits is 18432, while the sum is 35.

The square root of 21883823 is about 4678.0148567528. The cubic root of 21883823 is about 279.7098311997.

The spelling of 21883823 in words is "twenty-one million, eight hundred eighty-three thousand, eight hundred twenty-three".