20316539 has 2 divisors, whose sum is σ = 20316540. Its totient is φ = 20316538.

The previous prime is 20316523. The next prime is 20316551. The reversal of 20316539 is 93561302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20316539 - 2⁴ = 20316523 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20316239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10158269 + 10158270.

It is an arithmetic number, because the mean of its divisors is an integer number (10158270).

Almost surely, 2^20316539 is an apocalyptic number.

20316539 is a deficient number, since it is larger than the sum of its proper divisors (1).

20316539 is an equidigital number, since it uses as much as digits as its factorization.

20316539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 20316539 is about 4507.3871588760. The cubic root of 20316539 is about 272.8663042267.

The spelling of 20316539 in words is "twenty million, three hundred sixteen thousand, five hundred thirty-nine".