20019827 has 2 divisors, whose sum is σ = 20019828. Its totient is φ = 20019826.

The previous prime is 20019817. The next prime is 20019833. The reversal of 20019827 is 72891002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20019827 - 2⁶ = 20019763 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20019827.

It is not a weakly prime, because it can be changed into another prime (20019817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10009913 + 10009914.

It is an arithmetic number, because the mean of its divisors is an integer number (10009914).

Almost surely, 2^20019827 is an apocalyptic number.

20019827 is a deficient number, since it is larger than the sum of its proper divisors (1).

20019827 is an equidigital number, since it uses as much as digits as its factorization.

20019827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 20019827 is about 4474.3521318734. The cubic root of 20019827 is about 271.5314299653.

The spelling of 20019827 in words is "twenty million, nineteen thousand, eight hundred twenty-seven".