20195653 has 2 divisors, whose sum is σ = 20195654. Its totient is φ = 20195652.

The previous prime is 20195647. The next prime is 20195671. The reversal of 20195653 is 35659102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11710084 + 8485569 = 3422^2 + 2913^2 .

It is a cyclic number.

It is not a de Polignac number, because 20195653 - 2⁵ = 20195621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20195603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10097826 + 10097827.

It is an arithmetic number, because the mean of its divisors is an integer number (10097827).

Almost surely, 2^20195653 is an apocalyptic number.

It is an amenable number.

20195653 is a deficient number, since it is larger than the sum of its proper divisors (1).

20195653 is an equidigital number, since it uses as much as digits as its factorization.

20195653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 20195653 is about 4493.9573874259. The cubic root of 20195653 is about 272.3240308232.

The spelling of 20195653 in words is "twenty million, one hundred ninety-five thousand, six hundred fifty-three".