20789099 has 2 divisors, whose sum is σ = 20789100. Its totient is φ = 20789098.

The previous prime is 20789089. The next prime is 20789101. The reversal of 20789099 is 99098702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20789099 - 2²⁴ = 4011883 is a prime.

Together with 20789101, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20789029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10394549 + 10394550.

It is an arithmetic number, because the mean of its divisors is an integer number (10394550).

Almost surely, 2^20789099 is an apocalyptic number.

20789099 is a deficient number, since it is larger than the sum of its proper divisors (1).

20789099 is an equidigital number, since it uses as much as digits as its factorization.

20789099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 20789099 is about 4559.5064425878. The cubic root of 20789099 is about 274.9657213472.

The spelling of 20789099 in words is "twenty million, seven hundred eighty-nine thousand, ninety-nine".