20378933 has 2 divisors, whose sum is σ = 20378934. Its totient is φ = 20378932.

The previous prime is 20378867. The next prime is 20378951. The reversal of 20378933 is 33987302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13712209 + 6666724 = 3703^2 + 2582^2 .

It is a cyclic number.

It is not a de Polignac number, because 20378933 - 2²⁰ = 19330357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20378893 and 20378902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20378233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10189466 + 10189467.

It is an arithmetic number, because the mean of its divisors is an integer number (10189467).

Almost surely, 2^20378933 is an apocalyptic number.

It is an amenable number.

20378933 is a deficient number, since it is larger than the sum of its proper divisors (1).

20378933 is an equidigital number, since it uses as much as digits as its factorization.

20378933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 20378933 is about 4514.3031577421. The cubic root of 20378933 is about 273.1453514466.

The spelling of 20378933 in words is "twenty million, three hundred seventy-eight thousand, nine hundred thirty-three".