21829876 has 12 divisors (see below), whose sum is σ = 39134340. Its totient is φ = 10648640.

The previous prime is 21829861. The next prime is 21829897. The reversal of 21829876 is 67892812.

It can be written as a sum of positive squares in 2 ways, for example, as 7160976 + 14668900 = 2676^2 + 3830^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66391 + ... + 66718.

It is an arithmetic number, because the mean of its divisors is an integer number (3261195).

Almost surely, 2^21829876 is an apocalyptic number.

It is an amenable number.

21829876 is a deficient number, since it is larger than the sum of its proper divisors (17304464).

21829876 is a wasteful number, since it uses less digits than its factorization.

21829876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133154 (or 133152 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The square root of 21829876 is about 4672.2452846570. The cubic root of 21829876 is about 279.4797994453.

The spelling of 21829876 in words is "twenty-one million, eight hundred twenty-nine thousand, eight hundred seventy-six".