20532839 has 2 divisors, whose sum is σ = 20532840. Its totient is φ = 20532838.

The previous prime is 20532833. The next prime is 20532871. The reversal of 20532839 is 93823502.

It is an a-pointer prime, because the next prime (20532871) can be obtained adding 20532839 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20532839 - 2⁴ = 20532823 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20532833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10266419 + 10266420.

It is an arithmetic number, because the mean of its divisors is an integer number (10266420).

Almost surely, 2^20532839 is an apocalyptic number.

20532839 is a deficient number, since it is larger than the sum of its proper divisors (1).

20532839 is an equidigital number, since it uses as much as digits as its factorization.

20532839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 20532839 is about 4531.3175788064. The cubic root of 20532839 is about 273.8312447636.

The spelling of 20532839 in words is "twenty million, five hundred thirty-two thousand, eight hundred thirty-nine".