20046839 has 2 divisors, whose sum is σ = 20046840. Its totient is φ = 20046838.

The previous prime is 20046833. The next prime is 20046841. The reversal of 20046839 is 93864002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20046839 - 2¹⁶ = 19981303 is a prime.

Together with 20046841, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20046833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10023419 + 10023420.

It is an arithmetic number, because the mean of its divisors is an integer number (10023420).

Almost surely, 2^20046839 is an apocalyptic number.

20046839 is a deficient number, since it is larger than the sum of its proper divisors (1).

20046839 is an equidigital number, since it uses as much as digits as its factorization.

20046839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20046839 is about 4477.3696519273. The cubic root of 20046839 is about 271.6534974651.

The spelling of 20046839 in words is "twenty million, forty-six thousand, eight hundred thirty-nine".