20100611 has 2 divisors, whose sum is σ = 20100612. Its totient is φ = 20100610.

The previous prime is 20100601. The next prime is 20100629. The reversal of 20100611 is 11600102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20100611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20100592 and 20100601.

It is not a weakly prime, because it can be changed into another prime (20100601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050305 + 10050306.

It is an arithmetic number, because the mean of its divisors is an integer number (10050306).

Almost surely, 2^20100611 is an apocalyptic number.

20100611 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100611 is an equidigital number, since it uses as much as digits as its factorization.

20100611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 20100611 is about 4483.3704955089. The cubic root of 20100611 is about 271.8961676565.

Adding to 20100611 its reverse (11600102), we get a palindrome (31700713).

The spelling of 20100611 in words is "twenty million, one hundred thousand, six hundred eleven".