21829052 has 12 divisors (see below), whose sum is σ = 43658160. Its totient is φ = 9355296.

The previous prime is 21828973. The next prime is 21829091. The reversal of 21829052 is 25092812.

21829052 is an admirable number.

It is a super-2 number, since 2×21829052² = 953015022437408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389777 + ... + 389832.

It is an arithmetic number, because the mean of its divisors is an integer number (3638180).

Almost surely, 2^21829052 is an apocalyptic number.

It is an amenable number.

21829052 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21829052 is a wasteful number, since it uses less digits than its factorization.

21829052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779620 (or 779618 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 21829052 is about 4672.1571035230. The cubic root of 21829052 is about 279.4762829457.

It can be divided in two parts, 218 and 29052, that multiplied together give a palindrome (6333336).

The spelling of 21829052 in words is "twenty-one million, eight hundred twenty-nine thousand, fifty-two".