20541841 has 2 divisors, whose sum is σ = 20541842. Its totient is φ = 20541840.

The previous prime is 20541839. The next prime is 20541863. The reversal of 20541841 is 14814502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20439441 + 102400 = 4521^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 20541841 - 2¹ = 20541839 is a prime.

Together with 20541839, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20541821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270920 + 10270921.

It is an arithmetic number, because the mean of its divisors is an integer number (10270921).

Almost surely, 2^20541841 is an apocalyptic number.

It is an amenable number.

20541841 is a deficient number, since it is larger than the sum of its proper divisors (1).

20541841 is an equidigital number, since it uses as much as digits as its factorization.

20541841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 20541841 is about 4532.3107792825. The cubic root of 20541841 is about 273.8712565826.

The spelling of 20541841 in words is "twenty million, five hundred forty-one thousand, eight hundred forty-one".