21829512 has 32 divisors (see below), whose sum is σ = 54756000. Its totient is φ = 7252224.

The previous prime is 21829501. The next prime is 21829529. The reversal of 21829512 is 21592812.

It is a self number, because there is not a number n which added to its sum of digits gives 21829512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6739 + ... + 9437.

It is an arithmetic number, because the mean of its divisors is an integer number (1711125).

Almost surely, 2^21829512 is an apocalyptic number.

It is an amenable number.

21829512 is an abundant number, since it is smaller than the sum of its proper divisors (32926488).

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

21829512 is a wasteful number, since it uses less digits than its factorization.

21829512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3045 (or 3041 counting only the distinct ones).

The product of its digits is 2880, while the sum is 30.

The square root of 21829512 is about 4672.2063310603. The cubic root of 21829512 is about 279.4782460510.

The spelling of 21829512 in words is "twenty-one million, eight hundred twenty-nine thousand, five hundred twelve".