20324649 has 4 divisors (see below), whose sum is σ = 27099536. Its totient is φ = 13549764.

The previous prime is 20324641. The next prime is 20324653. The reversal of 20324649 is 94642302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20324649 - 2³ = 20324641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20324641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3387439 + ... + 3387444.

It is an arithmetic number, because the mean of its divisors is an integer number (6774884).

Almost surely, 2^20324649 is an apocalyptic number.

It is an amenable number.

20324649 is a deficient number, since it is larger than the sum of its proper divisors (6774887).

20324649 is an equidigital number, since it uses as much as digits as its factorization.

20324649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6774886.

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

The square root of 20324649 is about 4508.2867033941. The cubic root of 20324649 is about 272.9026071838.

It can be divided in two parts, 2032464 and 9, that multiplied together give a triangular number (18292176 = T₆₀₄₈).

The spelling of 20324649 in words is "twenty million, three hundred twenty-four thousand, six hundred forty-nine".