20849141 has 2 divisors, whose sum is σ = 20849142. Its totient is φ = 20849140.

The previous prime is 20849131. The next prime is 20849161. The reversal of 20849141 is 14194802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14326225 + 6522916 = 3785^2 + 2554^2 .

It is a cyclic number.

It is not a de Polignac number, because 20849141 - 2⁶ = 20849077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20849111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10424570 + 10424571.

It is an arithmetic number, because the mean of its divisors is an integer number (10424571).

Almost surely, 2^20849141 is an apocalyptic number.

It is an amenable number.

20849141 is a deficient number, since it is larger than the sum of its proper divisors (1).

20849141 is an equidigital number, since it uses as much as digits as its factorization.

20849141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 20849141 is about 4566.0859606451. The cubic root of 20849141 is about 275.2301808337.

The spelling of 20849141 in words is "twenty million, eight hundred forty-nine thousand, one hundred forty-one".