20302313078357 has 2 divisors, whose sum is σ = 20302313078358. Its totient is φ = 20302313078356.

The previous prime is 20302313078353. The next prime is 20302313078363. The reversal of 20302313078357 is 75387031320302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11766484713361 + 8535828364996 = 3430231^2 + 2921614^2 .

It is a cyclic number.

It is not a de Polignac number, because 20302313078357 - 2² = 20302313078353 is a prime.

It is a super-3 number, since 3×20302313078357³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20302313078353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151156539178 + 10151156539179.

It is an arithmetic number, because the mean of its divisors is an integer number (10151156539179).

Almost surely, 2^{20302313078357} is an apocalyptic number.

It is an amenable number.

20302313078357 is a deficient number, since it is larger than the sum of its proper divisors (1).

20302313078357 is an equidigital number, since it uses as much as digits as its factorization.

20302313078357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 44.

Adding to 20302313078357 its reverse (75387031320302), we get a palindrome (95689344398659).

The spelling of 20302313078357 in words is "twenty trillion, three hundred two billion, three hundred thirteen million, seventy-eight thousand, three hundred fifty-seven".