20345359 has 2 divisors, whose sum is σ = 20345360. Its totient is φ = 20345358.

The previous prime is 20345357. The next prime is 20345411. The reversal of 20345359 is 95354302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20345359 - 2¹ = 20345357 is a prime.

Together with 20345357, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20345359.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20345357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172679 + 10172680.

It is an arithmetic number, because the mean of its divisors is an integer number (10172680).

Almost surely, 2^20345359 is an apocalyptic number.

20345359 is a deficient number, since it is larger than the sum of its proper divisors (1).

20345359 is an equidigital number, since it uses as much as digits as its factorization.

20345359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 20345359 is about 4510.5830000123. The cubic root of 20345359 is about 272.9952679792.

The spelling of 20345359 in words is "twenty million, three hundred forty-five thousand, three hundred fifty-nine".