21829832 has 16 divisors (see below), whose sum is σ = 41170140. Its totient is φ = 10851136.

The previous prime is 21829817. The next prime is 21829861. The reversal of 21829832 is 23892812.

It can be written as a sum of positive squares in 2 ways, for example, as 20124196 + 1705636 = 4486^2 + 1306^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21829792 and 21829801.

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, 6503 + ... + 9270.

Almost surely, 2^21829832 is an apocalyptic number.

It is an amenable number.

21829832 is a deficient number, since it is larger than the sum of its proper divisors (19340308).

21829832 is a wasteful number, since it uses less digits than its factorization.

21829832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15952 (or 15948 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 21829832 is about 4672.2405759978. The cubic root of 21829832 is about 279.4796116733.

The spelling of 21829832 in words is "twenty-one million, eight hundred twenty-nine thousand, eight hundred thirty-two".