21883869 has 24 divisors (see below), whose sum is σ = 36591360. Its totient is φ = 12343968.

The previous prime is 21883853. The next prime is 21883871. The reversal of 21883869 is 96838812.

It is not a de Polignac number, because 21883869 - 2⁴ = 21883853 is a prime.

It is a super-3 number, since 3×21883869³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21883819) 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 23 ways as a sum of consecutive naturals, for example, 2779 + ... + 7175.

It is an arithmetic number, because the mean of its divisors is an integer number (1524640).

Almost surely, 2^21883869 is an apocalyptic number.

It is an amenable number.

21883869 is a deficient number, since it is larger than the sum of its proper divisors (14707491).

21883869 is a wasteful number, since it uses less digits than its factorization.

21883869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4489 (or 4486 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 21883869 is about 4678.0197733656. The cubic root of 21883869 is about 279.7100271838.

The spelling of 21883869 in words is "twenty-one million, eight hundred eighty-three thousand, eight hundred sixty-nine".