20184641 has 2 divisors, whose sum is σ = 20184642. Its totient is φ = 20184640.

The previous prime is 20184617. The next prime is 20184649. The reversal of 20184641 is 14648102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16200625 + 3984016 = 4025^2 + 1996^2 .

It is a cyclic number.

It is not a de Polignac number, because 20184641 - 2¹⁰ = 20183617 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20184641.

It is not a weakly prime, because it can be changed into another prime (20184649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10092320 + 10092321.

It is an arithmetic number, because the mean of its divisors is an integer number (10092321).

Almost surely, 2^20184641 is an apocalyptic number.

It is an amenable number.

20184641 is a deficient number, since it is larger than the sum of its proper divisors (1).

20184641 is an equidigital number, since it uses as much as digits as its factorization.

20184641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 20184641 is about 4492.7320196068. The cubic root of 20184641 is about 272.2745254924.

The spelling of 20184641 in words is "twenty million, one hundred eighty-four thousand, six hundred forty-one".