21829652 has 12 divisors (see below), whose sum is σ = 41140596. Its totient is φ = 10075200.

The previous prime is 21829627. The next prime is 21829657. The reversal of 21829652 is 25692812.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11806096 + 10023556 = 3436^2 + 3166^2 .

It is a super-2 number, since 2×21829652² = 953067412882208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21829657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209849 + ... + 209952.

It is an arithmetic number, because the mean of its divisors is an integer number (3428383).

Almost surely, 2^21829652 is an apocalyptic number.

It is an amenable number.

21829652 is a deficient number, since it is larger than the sum of its proper divisors (19310944).

21829652 is a wasteful number, since it uses less digits than its factorization.

21829652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419818 (or 419816 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 21829652 is about 4672.2213132513. The cubic root of 21829652 is about 279.4788435124.

The spelling of 21829652 in words is "twenty-one million, eight hundred twenty-nine thousand, six hundred fifty-two".