20315304525251 has 2 divisors, whose sum is σ = 20315304525252. Its totient is φ = 20315304525250.

The previous prime is 20315304525223. The next prime is 20315304525323. The reversal of 20315304525251 is 15252540351302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20315304525251 is a prime.

It is a super-2 number, since 2×20315304525251² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20315304525151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10157652262625 + 10157652262626.

It is an arithmetic number, because the mean of its divisors is an integer number (10157652262626).

Almost surely, 2^{20315304525251} is an apocalyptic number.

20315304525251 is a deficient number, since it is larger than the sum of its proper divisors (1).

20315304525251 is an equidigital number, since it uses as much as digits as its factorization.

20315304525251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180000, while the sum is 38.

Adding to 20315304525251 its reverse (15252540351302), we get a palindrome (35567844876553).

The spelling of 20315304525251 in words is "twenty trillion, three hundred fifteen billion, three hundred four million, five hundred twenty-five thousand, two hundred fifty-one".