20189759 has 2 divisors, whose sum is σ = 20189760. Its totient is φ = 20189758.

The previous prime is 20189737. The next prime is 20189777. The reversal of 20189759 is 95798102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20189759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20189779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10094879 + 10094880.

It is an arithmetic number, because the mean of its divisors is an integer number (10094880).

Almost surely, 2^20189759 is an apocalyptic number.

20189759 is a deficient number, since it is larger than the sum of its proper divisors (1).

20189759 is an equidigital number, since it uses as much as digits as its factorization.

20189759 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 20189759 is about 4493.3015701152. The cubic root of 20189759 is about 272.2975361115.

The spelling of 20189759 in words is "twenty million, one hundred eighty-nine thousand, seven hundred fifty-nine".