20944307 has 2 divisors, whose sum is σ = 20944308. Its totient is φ = 20944306.

The previous prime is 20944291. The next prime is 20944309. The reversal of 20944307 is 70344902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20944307 - 2⁴ = 20944291 is a prime.

Together with 20944309, it forms a pair of twin primes.

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 20944307.

It is not a weakly prime, because it can be changed into another prime (20944309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10472153 + 10472154.

It is an arithmetic number, because the mean of its divisors is an integer number (10472154).

Almost surely, 2^20944307 is an apocalyptic number.

20944307 is a deficient number, since it is larger than the sum of its proper divisors (1).

20944307 is an equidigital number, since it uses as much as digits as its factorization.

20944307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20944307 is about 4576.4950562630. The cubic root of 20944307 is about 275.6483084379.

The spelling of 20944307 in words is "twenty million, nine hundred forty-four thousand, three hundred seven".