20329799 has 4 divisors (see below), whose sum is σ = 23234064. Its totient is φ = 17425536.

The previous prime is 20329741. The next prime is 20329853. The reversal of 20329799 is 99792302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20329799 - 2¹⁶ = 20264263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20329499) 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 3 ways as a sum of consecutive naturals, for example, 1452122 + ... + 1452135.

It is an arithmetic number, because the mean of its divisors is an integer number (5808516).

Almost surely, 2^20329799 is an apocalyptic number.

20329799 is a deficient number, since it is larger than the sum of its proper divisors (2904265).

20329799 is an equidigital number, since it uses as much as digits as its factorization.

20329799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2904264.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 20329799 is about 4508.8578376347. The cubic root of 20329799 is about 272.9256552200.

The spelling of 20329799 in words is "twenty million, three hundred twenty-nine thousand, seven hundred ninety-nine".