21029833 has 8 divisors (see below), whose sum is σ = 24291360. Its totient is φ = 17993280.

The previous prime is 21029831. The next prime is 21029837. The reversal of 21029833 is 33892012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21029833 - 2¹ = 21029831 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21029831) by changing a digit.

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, 56043 + ... + 56416.

It is an arithmetic number, because the mean of its divisors is an integer number (3036420).

Almost surely, 2^21029833 is an apocalyptic number.

It is an amenable number.

21029833 is a deficient number, since it is larger than the sum of its proper divisors (3261527).

21029833 is a wasteful number, since it uses less digits than its factorization.

21029833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112487.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 21029833 is about 4585.8295868905. The cubic root of 21029833 is about 276.0230018287.

It can be divided in two parts, 2102 and 9833, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 21029833 in words is "twenty-one million, twenty-nine thousand, eight hundred thirty-three".