20541839 has 2 divisors, whose sum is σ = 20541840. Its totient is φ = 20541838.

The previous prime is 20541827. The next prime is 20541841. The reversal of 20541839 is 93814502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20541839 - 2⁸ = 20541583 is a prime.

Together with 20541841, 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 (20541739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270919 + 10270920.

It is an arithmetic number, because the mean of its divisors is an integer number (10270920).

Almost surely, 2^20541839 is an apocalyptic number.

20541839 is a deficient number, since it is larger than the sum of its proper divisors (1).

20541839 is an equidigital number, since it uses as much as digits as its factorization.

20541839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 20541839 is about 4532.3105586445. The cubic root of 20541839 is about 273.8712476944.

The spelling of 20541839 in words is "twenty million, five hundred forty-one thousand, eight hundred thirty-nine".