20336839 has 2 divisors, whose sum is σ = 20336840. Its totient is φ = 20336838.

The previous prime is 20336809. The next prime is 20336843. The reversal of 20336839 is 93863302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20336839 - 2¹³ = 20328647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20336809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10168419 + 10168420.

It is an arithmetic number, because the mean of its divisors is an integer number (10168420).

Almost surely, 2^20336839 is an apocalyptic number.

20336839 is a deficient number, since it is larger than the sum of its proper divisors (1).

20336839 is an equidigital number, since it uses as much as digits as its factorization.

20336839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 20336839 is about 4509.6384555749. The cubic root of 20336839 is about 272.9571553653.

The spelling of 20336839 in words is "twenty million, three hundred thirty-six thousand, eight hundred thirty-nine".