20816029 has 8 divisors (see below), whose sum is σ = 22752800. Its totient is φ = 18927216.

The previous prime is 20816021. The next prime is 20816071. The reversal of 20816029 is 92061802.

It is a happy number.

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 20816029 - 2³ = 20816021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20815988 and 20816006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20816021) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11079 + ... + 12820.

It is an arithmetic number, because the mean of its divisors is an integer number (2844100).

Almost surely, 2^20816029 is an apocalyptic number.

It is an amenable number.

20816029 is a deficient number, since it is larger than the sum of its proper divisors (1936771).

20816029 is a wasteful number, since it uses less digits than its factorization.

20816029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23979.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 20816029 is about 4562.4586573469. The cubic root of 20816029 is about 275.0843994389.

The spelling of 20816029 in words is "twenty million, eight hundred sixteen thousand, twenty-nine".