20996099 has 2 divisors, whose sum is σ = 20996100. Its totient is φ = 20996098.

The previous prime is 20996069. The next prime is 20996117. The reversal of 20996099 is 99069902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20996099 - 2²⁰ = 19947523 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20996009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10498049 + 10498050.

It is an arithmetic number, because the mean of its divisors is an integer number (10498050).

Almost surely, 2^20996099 is an apocalyptic number.

20996099 is a deficient number, since it is larger than the sum of its proper divisors (1).

20996099 is an equidigital number, since it uses as much as digits as its factorization.

20996099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 20996099 is about 4582.1500411925. The cubic root of 20996099 is about 275.8753331465.

The spelling of 20996099 in words is "twenty million, nine hundred ninety-six thousand, ninety-nine".