20446329 has 16 divisors (see below), whose sum is σ = 28413440. Its totient is φ = 13063680.

The previous prime is 20446301. The next prime is 20446343. The reversal of 20446329 is 92364402.

It is not a de Polignac number, because 20446329 - 2⁵ = 20446297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20446296 and 20446305.

It is not an unprimeable number, because it can be changed into a prime (20446369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9129 + ... + 11145.

It is an arithmetic number, because the mean of its divisors is an integer number (1775840).

Almost surely, 2^20446329 is an apocalyptic number.

It is an amenable number.

20446329 is a deficient number, since it is larger than the sum of its proper divisors (7967111).

20446329 is a wasteful number, since it uses less digits than its factorization.

20446329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 20446329 is about 4521.7617141995. The cubic root of 20446329 is about 273.4461301592.

The spelling of 20446329 in words is "twenty million, four hundred forty-six thousand, three hundred twenty-nine".