20830907 has 2 divisors, whose sum is σ = 20830908. Its totient is φ = 20830906.

The previous prime is 20830891. The next prime is 20830937. The reversal of 20830907 is 70903802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20830907 - 2⁴ = 20830891 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20830907.

It is not a weakly prime, because it can be changed into another prime (20830937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10415453 + 10415454.

It is an arithmetic number, because the mean of its divisors is an integer number (10415454).

Almost surely, 2^20830907 is an apocalyptic number.

20830907 is a deficient number, since it is larger than the sum of its proper divisors (1).

20830907 is an equidigital number, since it uses as much as digits as its factorization.

20830907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20830907 is about 4564.0888466374. The cubic root of 20830907 is about 275.1499215583.

The spelling of 20830907 in words is "twenty million, eight hundred thirty thousand, nine hundred seven".