20324641 has 2 divisors, whose sum is σ = 20324642. Its totient is φ = 20324640.

The previous prime is 20324609. The next prime is 20324653. The reversal of 20324641 is 14642302.

It is a happy number.

It is the 1841-st star number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16638241 + 3686400 = 4079^2 + 1920^2 .

It is a cyclic number.

It is not a de Polignac number, because 20324641 - 2⁵ = 20324609 is a prime.

It is not a weakly prime, because it can be changed into another prime (20324141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10162320 + 10162321.

It is an arithmetic number, because the mean of its divisors is an integer number (10162321).

Almost surely, 2^20324641 is an apocalyptic number.

It is an amenable number.

20324641 is a deficient number, since it is larger than the sum of its proper divisors (1).

20324641 is an equidigital number, since it uses as much as digits as its factorization.

20324641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20324641 is about 4508.2858161390. The cubic root of 20324641 is about 272.9025713780.

Adding to 20324641 its reverse (14642302), we get a palindrome (34966943).

The spelling of 20324641 in words is "twenty million, three hundred twenty-four thousand, six hundred forty-one".