20339849 has 2 divisors, whose sum is σ = 20339850. Its totient is φ = 20339848.

The previous prime is 20339831. The next prime is 20339857. The reversal of 20339849 is 94893302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19642624 + 697225 = 4432^2 + 835^2 .

It is a cyclic number.

It is not a de Polignac number, because 20339849 - 2¹⁶ = 20274313 is a prime.

It is not a weakly prime, because it can be changed into another prime (20339819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10169924 + 10169925.

It is an arithmetic number, because the mean of its divisors is an integer number (10169925).

Almost surely, 2^20339849 is an apocalyptic number.

It is an amenable number.

20339849 is a deficient number, since it is larger than the sum of its proper divisors (1).

20339849 is an equidigital number, since it uses as much as digits as its factorization.

20339849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 20339849 is about 4509.9721728632. The cubic root of 20339849 is about 272.9706212487.

The spelling of 20339849 in words is "twenty million, three hundred thirty-nine thousand, eight hundred forty-nine".