21829252 has 24 divisors (see below), whose sum is σ = 40376000. Its totient is φ = 10298016.

The previous prime is 21829217. The next prime is 21829253. The reversal of 21829252 is 25292812.

It is not an unprimeable number, because it can be changed into a prime (21829253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26113 + ... + 26935.

Almost surely, 2^21829252 is an apocalyptic number.

It is an amenable number.

21829252 is a deficient number, since it is larger than the sum of its proper divisors (18546748).

21829252 is a wasteful number, since it uses less digits than its factorization.

21829252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195 (or 1193 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 21829252 is about 4672.1785068638. The cubic root of 21829252 is about 279.4771364731.

The spelling of 21829252 in words is "twenty-one million, eight hundred twenty-nine thousand, two hundred fifty-two".