20916113 has 2 divisors, whose sum is σ = 20916114. Its totient is φ = 20916112.

The previous prime is 20916089. The next prime is 20916121. The reversal of 20916113 is 31161902.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13337104 + 7579009 = 3652^2 + 2753^2 .

It is a cyclic number.

It is not a de Polignac number, because 20916113 - 2⁸ = 20915857 is a prime.

It is not a weakly prime, because it can be changed into another prime (20916143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10458056 + 10458057.

It is an arithmetic number, because the mean of its divisors is an integer number (10458057).

Almost surely, 2^20916113 is an apocalyptic number.

It is an amenable number.

20916113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20916113 is an equidigital number, since it uses as much as digits as its factorization.

20916113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 20916113 is about 4573.4137140652. The cubic root of 20916113 is about 275.5245656908.

The spelling of 20916113 in words is "twenty million, nine hundred sixteen thousand, one hundred thirteen".