20195603 has 2 divisors, whose sum is σ = 20195604. Its totient is φ = 20195602.

The previous prime is 20195579. The next prime is 20195621. The reversal of 20195603 is 30659102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20195603 - 2²⁰ = 19147027 is a prime.

It is a zygodrome in base 7.

It is not a weakly prime, because it can be changed into another prime (20195653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10097801 + 10097802.

It is an arithmetic number, because the mean of its divisors is an integer number (10097802).

Almost surely, 2^20195603 is an apocalyptic number.

20195603 is a deficient number, since it is larger than the sum of its proper divisors (1).

20195603 is an equidigital number, since it uses as much as digits as its factorization.

20195603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 20195603 is about 4493.9518243969. The cubic root of 20195603 is about 272.3238060848.

The spelling of 20195603 in words is "twenty million, one hundred ninety-five thousand, six hundred three".