20378357 has 2 divisors, whose sum is σ = 20378358. Its totient is φ = 20378356.

The previous prime is 20378333. The next prime is 20378381. The reversal of 20378357 is 75387302.

It is a balanced prime because it is at equal distance from previous prime (20378333) and next prime (20378381).

It can be written as a sum of positive squares in only one way, i.e., 15888196 + 4490161 = 3986^2 + 2119^2 .

It is a cyclic number.

It is not a de Polignac number, because 20378357 - 2¹² = 20374261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20378327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10189178 + 10189179.

It is an arithmetic number, because the mean of its divisors is an integer number (10189179).

Almost surely, 2^20378357 is an apocalyptic number.

It is an amenable number.

20378357 is a deficient number, since it is larger than the sum of its proper divisors (1).

20378357 is an equidigital number, since it uses as much as digits as its factorization.

20378357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 20378357 is about 4514.2393600694. The cubic root of 20378357 is about 273.1427779850.

The spelling of 20378357 in words is "twenty million, three hundred seventy-eight thousand, three hundred fifty-seven".