20675653 has 2 divisors, whose sum is σ = 20675654. Its totient is φ = 20675652.

The previous prime is 20675639. The next prime is 20675663. The reversal of 20675653 is 35657602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18122049 + 2553604 = 4257^2 + 1598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20675653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20675663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10337826 + 10337827.

It is an arithmetic number, because the mean of its divisors is an integer number (10337827).

Almost surely, 2^20675653 is an apocalyptic number.

It is an amenable number.

20675653 is a deficient number, since it is larger than the sum of its proper divisors (1).

20675653 is an equidigital number, since it uses as much as digits as its factorization.

20675653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 20675653 is about 4547.0488231379. The cubic root of 20675653 is about 274.4646466370.

The spelling of 20675653 in words is "twenty million, six hundred seventy-five thousand, six hundred fifty-three".