20348357 has 2 divisors, whose sum is σ = 20348358. Its totient is φ = 20348356.

The previous prime is 20348351. The next prime is 20348359. The reversal of 20348357 is 75384302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17522596 + 2825761 = 4186^2 + 1681^2 .

It is a cyclic number.

It is not a de Polignac number, because 20348357 - 2²⁰ = 19299781 is a prime.

Together with 20348359, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20348351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10174178 + 10174179.

It is an arithmetic number, because the mean of its divisors is an integer number (10174179).

Almost surely, 2^20348357 is an apocalyptic number.

It is an amenable number.

20348357 is a deficient number, since it is larger than the sum of its proper divisors (1).

20348357 is an equidigital number, since it uses as much as digits as its factorization.

20348357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 20348357 is about 4510.9153173164. The cubic root of 20348357 is about 273.0086764362.

The spelling of 20348357 in words is "twenty million, three hundred forty-eight thousand, three hundred fifty-seven".